Hazard Plain Automated baseline

Athens County, OH

Risk-assessment baseline packet

County FIPS:
39009
Release:
2026-10
Data as of:
2026-09-30
Storm Events data through:
2026-06-30

Hazard Plain is an independent product built from public federal data. It is not a FEMA document and is not reviewed or endorsed by FEMA or any state agency.

Hazard Plain release 2026-10, as of 2026-09-30.

Summary

Plan status as of 2026-09-30: Approved, expires 2031-02-10. Plan: Athens County 2025 Hazard Mitigation Plan (FEMA plan 111501), approved 2026-02-11.

Since the plan was approved on 2026-02-11: no new hazard declaration and 20 NOAA Storm Events records; details under "What changed since your last plan".

Highest expected annual loss (FEMA National Risk Index, modeled total; see B1-a): Inland Flooding ($21,368,610 a year), Heat Wave ($998,749) and Tornado ($698,980).

The tables that follow are organized by the items of FEMA's Local Mitigation Plan Review Tool, Element B (B1-a to B2-c); each heading says which item its tables support.

Plan clock

Status:
Approved, expires 2031-02-10
Plan:
Athens County 2025 Hazard Mitigation Plan (FEMA plan 111501)
Approved:
2026-02-11
Days to expiry:
1,594

What changed since your last plan (approved 2026-02-11)

New federal declarations:
none
Storm Events records since approval:
20 records (data through 2026-06-30)
Repetitive loss now:
FMA RL 7, SRL 7 (44 CFR 77.2); any definition: 53
Repeat-flood change:
this release sets the baseline count.

Sources: 1, 2, 4, 6 (numbered list at the end)

Plan status for every jurisdiction listed in this county

Source: 1

JurisdictionTypeStatusPlanApprovedExpiresDays to expirynegative = days since expiryUpdate underwayNotes
Athens CountyCountyApproved, expires 2031-02-10Athens County 2025 Hazard Mitigation Plan (FEMA plan 111501)2026-02-112031-02-101,594
Albany villageVillagePlan 111501 approved 2026-02-11, pending adoption here; not yet eligibleAthens County 2025 Hazard Mitigation Plan (FEMA plan 111501), pending adoption here2026-02-11 by FEMA; not yet adopted here2031-02-10 once adoptedFEMA tracker shows a plan approvable pending adoptionNot yet eligible: adopt the approved plan.
Amesville villageVillagePlan 111501 approved 2026-02-11, pending adoption here; not yet eligibleAthens County 2025 Hazard Mitigation Plan (FEMA plan 111501), pending adoption here2026-02-11 by FEMA; not yet adopted here2031-02-10 once adoptedFEMA tracker shows a plan approvable pending adoptionNot yet eligible: adopt the approved plan.
Athens cityCityPlan 111501 approved 2026-02-11, pending adoption here; not yet eligibleAthens County 2025 Hazard Mitigation Plan (FEMA plan 111501), pending adoption here2026-02-11 by FEMA; not yet adopted here2031-02-10 once adoptedFEMA tracker shows a plan approvable pending adoptionNot yet eligible: adopt the approved plan.
Chauncey villageVillageApproved, expires 2031-02-10Athens County 2025 Hazard Mitigation Plan (FEMA plan 111501)2026-02-112031-02-101,594this jurisdiction approved 2026-09-02
Coolville villageVillageApproved, expires 2031-02-10Athens County 2025 Hazard Mitigation Plan (FEMA plan 111501)2026-02-112031-02-101,594this jurisdiction approved 2026-07-01
Glouster villageVillagePlan 111501 approved 2026-02-11, pending adoption here; not yet eligibleAthens County 2025 Hazard Mitigation Plan (FEMA plan 111501), pending adoption here2026-02-11 by FEMA; not yet adopted here2031-02-10 once adoptedFEMA tracker shows a plan approvable pending adoptionNot yet eligible: adopt the approved plan.
Jacksonville villageVillagePlan 111501 approved 2026-02-11, pending adoption here; not yet eligibleAthens County 2025 Hazard Mitigation Plan (FEMA plan 111501), pending adoption here2026-02-11 by FEMA; not yet adopted here2031-02-10 once adoptedFEMA tracker shows a plan approvable pending adoptionNot yet eligible: adopt the approved plan.
Nelsonville cityCityPlan 111501 approved 2026-02-11, pending adoption here; not yet eligibleAthens County 2025 Hazard Mitigation Plan (FEMA plan 111501), pending adoption here2026-02-11 by FEMA; not yet adopted here2031-02-10 once adoptedFEMA tracker shows a plan approvable pending adoptionNot yet eligible: adopt the approved plan.
Trimble villageVillageApproved, expires 2031-02-10Athens County 2025 Hazard Mitigation Plan (FEMA plan 111501)2026-02-112031-02-101,594this jurisdiction approved 2026-07-01

State plan status and tribal plans in this state: see the state page.

Supports FEMA checklist item B1-a: hazard identification

Hazards NRI does not cover (local data needed)

  • dam failure (incl. upstream dams)
  • levee failure
  • flash flood as its own subtype
  • ice jams
  • debris flows
  • erosion (riverine and coastal)
  • land subsidence and sinkholes
  • expansive soils

The 18 National Risk Index hazards, ranked by expected annual loss (EAL)

Sources: 5, 6

Rank by EALHazardNRI risk ratingEAL ratingEAL buildingsmodeled dollars per yearEAL agriculturemodeled dollars per yearCost of expected deaths and injuriesFEMA's dollar value per year, not property damageEAL total (see note)modeled dollars per yearStorm Events records, 1996 to 2026-06-30countStorm Events coverage note
1Inland FloodingRelatively ModerateRelatively Moderate$20,975,585$118,070$274,955$21,368,610137
2Heat WaveRelatively LowRelatively Low$371under $1$998,378$998,74918
3TornadoRelatively LowRelatively Low$493,685$82$205,213$698,9803
4Strong WindRelatively ModerateRelatively Moderate$224,622$125$383,907$608,655219Includes 16 High Wind and 18 Strong Wind records (NOAA non-thunderstorm wind types, outside NRI's Strong Wind definition).
5LightningRelatively ModerateRelatively Moderate$20,554n/a$428,419$448,9734
6HailRelatively LowRelatively Low$348,478$1,482$2,724$352,68483
7Ice StormRelatively ModerateRelatively Moderate$257,123n/a$57,374$314,4972
8EarthquakeVery LowVery Low$182,801n/a$53,482$236,283Storm Events does not record earthquakes.
9Cold WaveVery LowRelatively Low$7,010$1,577$183,353$191,94034Includes 4 Frost/Freeze records (outside NRI's Cold Wave definition; counted in this table and in B1-d, not in the B1-e descriptor).
10HurricaneVery LowVery Low$87,328$3,225$3,250$93,8030No recorded events in Storm Events since 1996 (data through 2026-06-30).
11DroughtRelatively LowRelatively Lown/a$88,653n/a$88,65311
12LandslideRelatively LowRelatively Low$1,094n/a$31,323$32,4160Declared 4 times; no Storm Events record of this type.
13Winter WeatherRelatively LowRelatively Low$16,499$41$12,177$28,71770
14WildfireVery LowVery Low$3,011$2$1,118$4,1310No recorded events in Storm Events since 1996 (data through 2026-06-30).

Total = buildings + agriculture + population equivalence; FEMA values each expected death (or 10 injuries) at $13.7 million (2024 dollars).

NRI risk rating combines expected annual loss with social vulnerability and community resilience; EAL rating rates expected annual loss alone. Both compare this county with all U.S. counties.

Local data needed: state and local landslide and wildfire records (Storm Events records these hazards only in part).

Not applicable to this county per NRI, with no federal declaration and no Storm Events record since 1996: avalanche, coastal flooding, tsunami and volcanic activity. That is the evidence for leaving them out of the plan.

The state hazard mitigation plan also lists hazards for this county; FEMA asks the plan to explain any hazard it leaves out.

Supports FEMA checklist item B1-b: hazard location

Affects the whole county (national data give no location within it): Cold Wave, Drought, Hail, Heat Wave, Ice Storm, Lightning, Strong Wind and Winter Weather.

Inland Flooding: The FEMA Flood Insurance Rate Map (FIRM) is the required location source for flooding. See the FEMA Flood Map Service Center (https://msc.fema.gov) for this county.

Hazards that vary within the county: highest-rated census tracts

Source: 5

HazardHighest-rated census tractsNRI risk rating, score 0 to 100
Earthquaketract 9739.01 (Relatively Low, 65.4); tract 9734 (Relatively Low, 61.1); tract 9728 (Relatively Low, 53.3)
Hurricanetract 9739.01 (Relatively Low, 60.6); tract 9734 (Relatively Low, 52.5); tract 9729 (Relatively Low, 52.3)
Landslidetract 9735 (Relatively Moderate, 97.5); tract 9737 (Relatively Moderate, 97.4); tract 9736 (Relatively Moderate, 96.3)
Tornadotract 9739.01 (Relatively Moderate, 66.6); tract 9728 (Relatively Moderate, 59.8); tract 9738 (Relatively Moderate, 53.6)
Wildfiretract 9736 (Very Low, 67.5); tract 9734 (Very Low, 60.3); tract 9728 (Very Low, 59.5)

Up to 3 census tracts per hazard, highest National Risk Index rating first, then highest score; a tract number is the Census tract number (for example 9739.01 is Census Tract 9739.01). FEMA's Resilience Analysis and Planning Tool maps the National Risk Index for every tract: https://www.fema.gov/emergency-managers/practitioners/resilience-analysis-and-planning-tool

Supports FEMA checklist item B1-c: hazard extent

Extent: scale, observed range and worst recorded event per hazard

Sources: 6, 7

HazardScaleRecordscount and yearsObserved rangeWorst recorded eventMost damaging (when different)How it applies to jurisdictionsNote
Cold/Wind Chill, Extreme Cold/Wind Chillwind chill30 records, 1996 to 2026 (30 zone-level)1 day to 31 days (median 2 days); 25 with a recorded valueDecember 2000 (1 monthly summary record), zone-levelExtreme Cold/Wind Chill, 2014-01-06, $100,000 property; $0 crops (zone total, 2014 dollars)Countywide (zone-level records).Cold/Wind Chill records from May to September (a frost night, not a cold wave) are counted but not used for the longest run.
Frost/Freeze (outside NRI's Cold Wave definition)crop damage4 records, 2003 to 2004 (4 zone-level)No crop damage reported in 4 records.Countywide (zone-level records).
DroughtU.S. Drought Monitor scale (D0 to D4)11 records, 1999 to 2025 (11 zone-level)25 days to 153 days (median 76 days); 4 with a recorded value153 days (5 months), 1999-06-01 to 1999-10-31, a run of 5 consecutive Storm Events drought records, zone-levelCountywide (zone-level records).Storm Events enters a drought at D2 or worse east of the Rockies and D3 or worse from the Rockies west (NWS Instruction 10-1605); NRI drought counts D3 and D4 only.
EarthquakeModified Mercalli (local data)0Storm Events does not record earthquakes; the USGS earthquake catalog is the source.
Hailhail size (inches)93 records, 1982 to 20260.75 in to 2.5 in (median 1 in); 93 with a recorded value2.5 in hail, 2016-04-28Hail, 2002-04-28, $200,000 property; crops not reported (2002 dollars)Event records naming jurisdictions in the plan: Athens city (22 records), Nelsonville city (14 records), Coolville village (9 records), Albany village (7 records), Glouster village (2 records), Trimble village (2 records), Amesville village (1 record), Jacksonville village (1 record).
Excessive Heat, Heatheat index (in event narratives)18 records, 1997 to 2011 (18 zone-level)1 day to 3 days (median 2 days); 4 with a recorded value3 consecutive days, 2011-07-20 to 2011-07-22, zone-levelCountywide (zone-level records).Heat records from November to March (unseasonable warmth, not a heat wave) are counted but not used for the longest run.
Hurricane, Tropical Storm, Tropical DepressionSaffir-Simpson0Storm Events files every zone of a storm's episode under the storm's type; flooding from the storm is filed as Flood or Flash Flood records.
Ice StormSperry-Piltz ice scale (local data)2 records, 1999 to 2005 (2 zone-level)No damage reported in 2 records.Countywide (zone-level records).
Flash Flood, Flood, Lakeshore Flooddamage and flood days (flood depth: FIRM)137 records, 1996 to 2026 (12 zone-level)Flood, 2005-01-05, $4,500,000 property; crops not reported (2005 dollars); NWS zone OHZ075Event records naming jurisdictions in the plan: Albany village (15 records), Amesville village (8 records), Nelsonville city (8 records), Glouster village (7 records), Athens city (6 records), Jacksonville village (5 records), Chauncey village (3 records), Coolville village (2 records), Trimble village (2 records). Zone-level records (12) apply countywide.Flood depth: see the FEMA Flood Insurance Rate Map. Storm Events damage is often $0 or blank for floods, major ones included; FEMA Public Assistance by declaration (B1-d) shows which floods cost the most.
Debris Flownone (count and damage only)0
Lightningannualized frequency (the measure FEMA's Local Mitigation Planning Handbook names)4 records, 2001 to 2015Lightning, 2001-04-11, $40,000 property; crops not reported (2001 dollars)Event records naming jurisdictions in the plan: Athens city (2 records).Storm Events lists lightning with damage or casualties.
High Wind and Strong Wind (outside NRI's Strong Wind definition)wind speed (kt and mph)34 records, 1999 to 2026 (33 zone-level)30 kt (35 mph) to 51 kt (59 mph) (median 42 kt (48 mph)); 23 with a recorded value51 kt (59 mph) measured gust, High Wind, 2023-03-25; NWS zone OHZ075High Wind, 2001-12-14, $65,000 property; crops not reported (zone total, 2001 dollars)Event records naming jurisdictions in the plan: Athens city (1 record). Zone-level records (33) apply countywide.
Thunderstorm Windwind speed (kt and mph)221 records, 1969 to 202639 kt (45 mph) to 87 kt (100 mph) (median 50 kt (58 mph)); 170 with a recorded value87 kt (100 mph) estimated gust, Thunderstorm Wind, 2010-09-16, 6 direct injuriesThunderstorm Wind, 2012-06-29, $2,500,000 property; $0 crops (2012 dollars)Event records naming jurisdictions in the plan: Athens city (42 records), Nelsonville city (19 records), Albany village (9 records), Glouster village (7 records), Chauncey village (6 records), Amesville village (5 records), Coolville village (5 records), Jacksonville village (4 records), Trimble village (3 records).
TornadoEnhanced Fujita (Fujita before Feb 2007)4 records, 1980 to 2023F/EF0 to F/EF2 (median F/EF1); 4 with a recorded valueEF2 tornado, 2010-09-16, 3.3 mi within this county, 300 yd wide, $750,000 property; $0 crops (2010 dollars), 7 direct injuriesEvent records naming jurisdictions in the plan: Athens city (1 record).Before 1996 a tornado is listed once, under the county where it began, with its whole path's rating and length; from 1996 on, each county lists its own segment. Length is not used to rank tornadoes (see Methods).
Wildfireacres burned (local data)0
Winter Storm, Heavy Snow, Blizzard, Lake-Effect Snow, Winter Weather, Sleetnone in data (snowfall: local data)70 records, 1996 to 2026 (70 zone-level)Winter Storm, 2012-01-20, $80,000 property; $0 crops (2012 dollars); NWS zone OHZ075Countywide (zone-level records).

In event narratives only (local data needed): wind chill, temperature, heat index, ice thickness, acres burned and snow depth; any physical measure of debris flow and lightning.

Storm Events records are more complete after 1996; before 1996 only Tornado (from 1950), Hail and Thunderstorm Wind (from 1955) exist. Zone-level records from zones that no NWS zone-county file places in this county (mostly before 2020) are not counted here (the Methods page explains the zone matching).

Dollars are nominal (as reported), labeled with the year; not adjusted for inflation.

A monthly summary record covers most or all of a month; it does not count days at wave conditions.

Supports FEMA checklist item B1-d: previous occurrences

Federal declarations for this county: 19 declarations covering 15 separate hazard incidents counted in this packet (declarations for the same incident count once; non-natural and evacuation-only declarations are not counted).

Federal disaster declarations for this county

Sources: 1, 2, 3

DeclaredIncident beganFEMA numberTypeTitleMapped hazardCounty Public Assistancefederal share obligated, nominal dollarsNotes
2020-03-312020-01-20DR-4507-OHMajor disasterCOVID-19 PandemicNon-natural, not counted$7,642,665.61
2020-03-132020-01-20EM-3457-OHEmergencyCOVID-19Non-natural, not countedno Public Assistance recordedsame incident as DR-4507
2019-04-082019-02-05DR-4424-OHMajor disasterSevere Storms, Flooding, and LandslidesInland Flooding (primary); also designated: Landslide$1,994,813.95
2018-04-172018-02-14DR-4360-OHMajor disasterSevere Storms, Landslides, and MudslidesInland Flooding (primary); also designated: Landslide$5,171,927.23
2012-08-202012-06-29DR-4077-OHMajor disasterSevere Storms and Straight-Line WindsStrong Wind$356,056.16
2012-06-302012-06-29EM-3346-OHEmergencySevere StormsHazard not mapped (severe storm title names no single hazard); not countedno Public Assistance recordedsame incident as DR-4077
2011-07-132011-04-04DR-4002-OHMajor disasterSevere Storms and FloodingInland Flooding$1,709,907.46
2005-09-132005-08-29EM-3250-OHEmergencyHurricane Katrina EvacuationHurricane: evacuation support, not a local hazard event; not countedno Public Assistance recorded
2005-02-152004-12-22DR-1580-OHMajor disasterSevere Winter Storms, Flooding, and MudslidesInland Flooding; Landslide; Winter Weather$2,227,679.02
2004-09-192004-08-27DR-1556-OHMajor disasterSevere Storms and FloodingInland Flooding$175,674.96
2004-06-032004-05-18DR-1519-OHMajor disasterSevere Storms and FloodingInland Flooding$88,979.78
2004-01-262004-01-03DR-1507-OHMajor disasterSevere Storms, Flooding, Mudslides, and LandslidesInland Flooding; Landslide$722,173.51
2003-03-142003-02-14DR-1453-OHMajor disasterSevere Winter Storm and Record/Near Record SnowWinter Weather$1,094,783.68
1998-06-301998-06-24DR-1227-OHMajor disasterSevere Storms, Flooding, and TornadoesInland Flooding; Tornadono Public Assistance recorded
1997-03-041997-02-28DR-1164-OHMajor disasterSevere Storms and FloodingInland Floodingno Public Assistance recorded
1990-06-061990-05-28DR-870-OHMajor disasterSevere Storms, Tornadoes & FloodingInland Flooding; Tornadono Public Assistance recorded
1978-01-261978-01-26EM-3055-OHEmergencyBlizzards & SnowstormsWinter Weatherno Public Assistance recorded
1977-02-021977-02-02EM-3029-OHEmergencySnowstormsWinter Weatherno Public Assistance recorded
1968-06-051968-06-05DR-243-OHMajor disasterHeavy Rains & FloodingInland Floodingno Public Assistance recorded

County Public Assistance: applicants the FEMA record places in this county, including any state agencies FEMA files there; statewide rows are listed on the state page; federal share obligated, nominal dollars.

Statewide declarations

Source: 2

DeclaredIncident beganFEMA numberTypeTitleMapped hazard
1964-03-241964-03-24DR-167-OHMajor disasterSevere Storms & FloodingInland Flooding
1959-01-231959-01-23DR-90-OHMajor disasterFloodsInland Flooding
1956-05-171956-05-17DR-57-OHMajor disasterWind StormOther, not an NRI hazard; not counted

FEMA recorded these with designated area Statewide and no county, so they are listed on every county page in the state and not counted with county rows. Local data needed: whether each one affected this county.

Public Assistance not placed in any Ohio county: 1 row, $3,080,910.74; listed on the Ohio state page.

Source: 3

Previous occurrences by hazard, with explicit no-event rows

Sources: 2, 6, 7

HazardStorm Events records, all years on file(years in the Period column)Since plan approvalrecordsIn the 12 months before plan approvalrecordsLast 5 yearsrecordsDeclared incidents, all yearsseparate disastersDeclared since approvalseparate disastersPeriodStatement
Cold Wave34022001996 to 2026-06-30Includes 4 Frost/Freeze records.
Drought11015001996 to 2026-06-30
Earthquake000000Storm Events does not record earthquakes; the USGS earthquake catalog is the source.
Hail93128001955 to 2026-06-30
Heat Wave18000001996 to 2026-06-30
Hurricane0000001996 to 2026-06-30No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events
Ice Storm2000001996 to 2026-06-30
Inland Flooding1371217441101996 to 2026-06-30
Landslide0000401996 to 2026-06-30No Storm Events records of this type; 4 federal declared incidents (see declarations table)
Lightning4000001996 to 2026-06-30
Strong Wind25552972101955 to 2026-06-30Includes 16 High Wind and 18 Strong Wind records.
Tornado4001201950 to 2026-06-30
Wildfire0000001996 to 2026-06-30No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events
Winter Weather702517401996 to 2026-06-30

Notable Storm Events records

Sources: 1, 6, 7

DateEvent typeMagnitude or extentDamagenominal dollarsDeaths, injuriesdirect onlyLocationFlagsWhy listed
2023-03-25High Wind51 kt (59 mph) measured gust$10,000 property; $0 crops (zone total, 2023 dollars)0, 0NWS zone OHZ075 (ATHENS), zone-levelwithin last 5 yearsB1-c worst recorded: High Wind and Strong Wind
2016-04-28Hail2.5 in$50,000 property; $0 crops (2016 dollars)0, 0BROADWELLB1-c worst recorded: Hail
2014-01-06Winter Weather$0 property; $0 crops (zone total, 2014 dollars)1, 0NWS zone OHZ075 (ATHENS), zone-leveldeaths or injuries recorded
2012-05-04Flash Flood$250,000 property; $0 crops (2012 dollars)1, 0NELSONVILLE to CARBONDALEdeaths or injuries recorded
2011-07-20Heat$0 property; $0 crops (zone total, 2011 dollars)0, 0NWS zone OHZ075 (ATHENS), zone-levelB1-c worst recorded: Excessive Heat, Heat
2010-09-16Thunderstorm Wind87 kt (100 mph) estimated gust$2,000,000 property; $0 crops (2010 dollars)0, 6FLOODWOOD to CANAANVILLEB1-c worst recorded: Thunderstorm Wind
2010-09-16TornadoEF2, 3.3 mi within this county, 300 yd wide$750,000 property; $0 crops (2010 dollars)0, 7KIMBERLY to NEW FLOODWOODB1-c worst recorded: Tornado
2005-01-05Flood$4,500,000 property; crops not reported (zone total, 2005 dollars)0, 0NWS zone OHZ075 (ATHENS), zone-levelB1-c worst recorded: Flash Flood, Flood, Lakeshore Flood
2001-04-11Lightning$40,000 property; crops not reported (2001 dollars)0, 0STEWARTB1-c worst recorded: Lightning
2000-12-01Cold/Wind Chilldamage not reported0, 0NWS zone OHZ075 (ATHENS), zone-levelB1-c worst recorded: Cold/Wind Chill, Extreme Cold/Wind Chill
2000-08-09High Windspeed not recorded$20,000 property; crops not reported (2000 dollars)0, 8ATHENSdeaths or injuries recorded
1999-06-01Droughtdamage not reported0, 0NWS zone OHZ075 (ATHENS), zone-levelB1-c worst recorded: Drought

The full list is in the Excel file, sheet "B1-d Storm Events history" (628 rows).

Location is the place NOAA recorded, as written in its data; it need not be a jurisdiction in this plan.

Local data needed: state-declared emergencies, from your state emergency management agency (federal data do not include them).

FEMA's declaration data list no tribal or special-area declarations for this state.

Supports FEMA checklist item B1-e: probability of future events

Probability: FEMA annualized frequency and descriptor per hazard

Sources: 5, 6

HazardFEMA annualized frequency (modeled)unit per rowUnitIn plain termsDescriptorDescriptor basisNRI events or days in its record period (hail, wind and tornado are area-weighted, so can be fractional)NRI periodLocationNote
Cold Wave1.53event-days per yearabout 1.53 days per yearLikelyStorm Events event-days in 10 of 30 years, 1996 to 2025 (33.3%)292005-11-12 to 2024-11-12 (19 years)countywide
Drought5.33event-days per yearabout 5.33 days per yearLikelyStorm Events event-days in 4 of 30 years, 1996 to 2025 (13.3%)1682000 to 2025 (25.25 years; D3 and D4 only)countywide
Earthquake0.00101annual probability at a locationchance a given location in the county has at least minor-damage shaking in a year: 0.101%not shownmodeledsee B1-fNo descriptor (Storm Events does not record earthquakes).
Hail2.85events per yearabout 2.85 per yearHighly likelyFEMA annualized frequency (modeled)108.5 (modeled)1986 to 2023 (38 years)countywide
Heat Wave3.16event-days per yearabout 3.16 days per yearLikelyStorm Events event-days in 7 of 30 years, 1996 to 2025 (23.3%)532005-11-12 to 2024-11-12 (19 years)countywide
Hurricane0.023events per yearabout 1 in 44 yearsPossibleFEMA annualized frequency (modeled)81851 to 2024 (Atlantic)see B1-fNRI counts hurricane and tropical storm tracks passing within storm-force wind range; federal declarations are in B1-d.
Ice Storm0.703event-days per yearabout 0.703 days per yearPossibleStorm Events event-days in 2 of 30 years, 1996 to 2025 (6.67%)481946-12-31 to 2014-02-12 (67 years)countywide
Inland Flooding3.14event-days per yearabout 3.14 days per yearHighly likelyStorm Events event-days in 27 of 30 years, 1996 to 2025 (90%)881996 to 2023 (28 years)see B1-f
Landslide1.22events per year (modeled)about 1.22 per yearHighly likelyFEMA annualized frequency (modeled)not shownmodeledsee B1-f
Lightning45.8days per year with a strikeabout 45.8 days per yearHighly likelyFEMA annualized frequency (modeled)not shown1995 to 2023 (29 years; CONUS)countywide
Strong Wind1.13events per yearabout 1.13 per yearHighly likelyFEMA annualized frequency (modeled)431986 to 2023 (38 years)countywide
Tornado0.137events per yearabout 1 in 7 yearsLikelyFEMA annualized frequency (modeled)not shown1950 to 2023 (EF2+); 1986 to 2023 (EF0-1)see B1-f
Wildfire0.0000582annual probability at a locationchance a given location in the county burns in a year: 0.00582%Storm Events records in 0 of 30 years, 1996 to 2025 (0%)not shownmodeledsee B1-fNo descriptor: no Storm Events record 1996 to 2025
Winter Weather8.37event-days per yearabout 8.37 days per yearHighly likelyStorm Events event-days in 27 of 30 years, 1996 to 2025 (90%)1592005-11-12 to 2024-11-12 (19 years)countywide

FEMA annualized frequency (modeled) is the National Risk Index v1.20 (December 2025) estimate of how often a hazard affects this county in a year; it is not recorded events divided by years, and its unit differs by hazard (events, event-days, or days with a lightning strike per year). For earthquake, wildfire, coastal flooding and tsunami the value is the chance (or number of events) at a location in the county, not across the county, so no "1 in N years" is given and the descriptor comes from Storm Events where it has a record (none for earthquake). The Methods page gives each hazard's method, from FEMA's National Risk Index Technical Documentation v1.20.

Where NRI gives event-days, the descriptor comes from the share of years with a Storm Events record; NRI's source records more events, so the two differ.

Descriptor scale used in this packet (defined per unit)

Sources: 5, 6

UnitDescriptorDefinition
events per yearHighly likely1 or more per year
events per yearLikelyabout once in 1 to 10 years
events per yearPossibleabout once in 10 to 100 years
events per yearUnlikelyless than once in 100 years
annual probabilityLikely10% to under 100% chance in a given year
annual probabilityPossible1% to under 10% chance in a given year
annual probabilityUnlikelyunder 1% chance in a given year
event-days (share of years)Highly likelyevent-days recorded in 90% or more of years
event-days (share of years)Likelyevent-days recorded in 10% to under 90% of years
event-days (share of years)Possibleevent-days recorded in some years but under 10% of years
lightning strike-daysHighly likelycloud-to-ground strikes on 1 or more days per year

Intensity bands: historical frequency (Storm Events)

Source: 6

HazardBandYearsEventscounty-coded recordsYears in periodEvents per yearevents / years
Hail1.00-1.99 in1996 to 202543301.43
Hail2.00 in+1996 to 20253300.1
Thunderstorm Wind (counted as NRI Strong Wind)50-64 kt1996 to 2025137304.57
Thunderstorm Wind (counted as NRI Strong Wind)65 kt+1996 to 20254300.133
Thunderstorm Wind (counted as NRI Strong Wind)unmeasured or below 50 kt1996 to 202542301.4
TornadoEF0-11996 to 20252300.0667
TornadoEF2-31996 to 20251300.0333
TornadoEF4-51996 to 20250300
Tornadounrated (EFU)1996 to 20250300

The bands show how often events of each severity were recorded in this county, to profile how severe events have been (FEMA's probability item asks for the range of intensities).

Hail smaller than 1 inch is not counted: on 2010-01-05 the National Weather Service raised its severe-hail threshold from 3/4 inch to 1 inch, so smaller reports became less common after 2009 (NWS Service Change Notice 09-52). NRI hail frequency uses a 0.75 inch threshold.

Optional: future conditions. Not a required item in the 2025 FEMA Local Mitigation Planning Policy Guide; some states ask for it. The federal Climate Mapping for Resilience and Adaptation (CMRA) site gives county exposure to future climate conditions (https://resilience.climate.gov/).

Supports FEMA checklist item B1-f: hazards that vary across jurisdictions

Range of census tract risk within the county

Source: 5

HazardTractsrated of allNRI risk score, 0 to 100Tracts by rating
MinMedianMax
Cold Wave15 of 1523.926.437.7Relatively Low 15
Drought9 of 1579.587.493.0Relatively Moderate 1, Relatively Low 8, No Rating 6
Earthquake15 of 1518.331.065.4Relatively Low 4, Very Low 11
Hail15 of 1561.071.090.2Relatively High 1, Relatively Moderate 7, Relatively Low 7
Heat Wave15 of 1559.568.787.3Relatively High 1, Relatively Moderate 14
Hurricane15 of 1538.247.860.6Relatively Low 4, Very Low 11
Ice Storm15 of 1572.985.695.6Relatively High 2, Relatively Moderate 13
Inland Flooding15 of 1554.476.299.8Very High 3, Relatively High 4, Relatively Moderate 8
Landslide15 of 1522.494.497.5Relatively Moderate 4, Relatively Low 7, Very Low 4
Lightning15 of 1571.780.796.1Very High 1, Relatively High 9, Relatively Moderate 5
Strong Wind15 of 1564.076.092.2Relatively High 3, Relatively Moderate 12
Tornado15 of 1534.845.666.6Relatively Moderate 3, Relatively Low 12
Wildfire15 of 1528.853.867.5Very Low 15
Winter Weather15 of 1535.745.271.5Relatively Moderate 4, Relatively Low 11

Drought: Agriculture is all of NRI's expected annual loss for this hazard in the county, so the tract range mostly reflects where crop and livestock value is.

Rated tracts only: No Rating (score 0.0), Not Applicable and Insufficient Data tracts are counted but not used for the minimum, median and maximum.

The score ranks a tract against all U.S. tracts (100 = highest). The rating is FEMA's category for the tract's risk value, computed differently, so the two can disagree.

Frequency data for cold wave, drought, hail, heat wave, ice storm, lightning, strong wind and winter weather are county-wide or coarse (49 km grid or NWS zone), the same for every jurisdiction; the tract range mostly reflects where buildings and people are (crop and livestock value where a line above names agriculture).

Each jurisdiction (starting figures from federal data)

Sources: 1, 3, 4, 6

JurisdictionTypePlan statusRepetitive lossFMA RL and SRL (44 CFR 77.2); repeat-flood, any definitionPublic Assistance to this jurisdictionFEMA records matched by applicant name; federal share obligated, nominal dollarsEvent records naming this placeall years; since its planNotes
Athens CountyCountyApproved, expires 2031-02-10FMA RL 4, SRL 4; any 16$67,219.310 total; 0 since its planIncludes $59,907.53 for declarations not counted as hazard incidents (DR-4507-OH).
Albany villageVillagePlan 111501 approved 2026-02-11, pending adoption here; not yet eligibleFMA RL 0, SRL 0; any 0$20,017.5031 total; no approved plan
Amesville villageVillagePlan 111501 approved 2026-02-11, pending adoption here; not yet eligibleFMA RL 2, SRL 1; any 4$969.1814 total; no approved plan
Athens cityCityPlan 111501 approved 2026-02-11, pending adoption here; not yet eligibleFMA RL 0, SRL 0; any 1$1,692,272.3674 total; no approved plan
Chauncey villageVillageApproved, expires 2031-02-10FMA RL 0, SRL 1; any 9$09 total; 0 since its plan
Coolville villageVillageApproved, expires 2031-02-10FMA RL 0, SRL 0; any 0$43,069.2716 total; 0 since its plan
Glouster villageVillagePlan 111501 approved 2026-02-11, pending adoption here; not yet eligibleFMA RL 0, SRL 1; any 7$110,620.9316 total; no approved plan
Jacksonville villageVillagePlan 111501 approved 2026-02-11, pending adoption here; not yet eligibleFMA RL 0, SRL 0; any 2$10,755.2710 total; no approved plan
Nelsonville cityCityPlan 111501 approved 2026-02-11, pending adoption here; not yet eligibleFMA RL 0, SRL 0; any 2$565,059.7541 total; no approved plan
Trimble villageVillageApproved, expires 2031-02-10FMA RL 1, SRL 0; any 11$69,026.727 total; 2 since its plan

Repetitive-loss counts are for whole NFIP communities, which can extend beyond this county (see the note in B2-c).

County Public Assistance in B1-d also includes applicants filed under the county that are not jurisdictions in this plan (for example state agencies, special districts and nonprofits), so the jurisdiction rows add up to less.

Supports FEMA checklist items B2-a and B2-b: vulnerability and potential impacts

Local data needed

The table below gives county-level starting figures; the plan describes impacts for each jurisdiction and its own assets.

  • Critical facilities and lifelines per hazard
  • A problem statement per jurisdiction per hazard
  • Changes in development in hazard-prone areas since the last approval, or a statement of none (E1-a)
  • Future assets

County-level starter: exposure, expected annual loss and damage since the plan

Sources: 1, 2, 3, 5, 6, 7

HazardBuilding exposuremodeled dollarsAgriculture exposuremodeled dollarsPopulation exposedpeopleEAL buildingsmodeled dollars per yearEAL agriculturemodeled dollars per yearCost of expected deaths and injuriesFEMA's dollar value per year, not property damageEAL as % of exposurebuildings; agriculture where notedStorm Events damage since 2026-02-11county-coded records, property plus crops, nominal dollarsZone-level damage since planproperty plus crops, reported for the zonePublic Assistance since plannominal dollars; see noteNote
Cold Wave$13,133,514,613$14,710,53262,393$7,010$1,577$183,353under 0.0001%
Droughtn/a$5,364,695n/an/a$88,653n/a1.65% (agriculture)NRI has no building exposure for this hazard; agriculture shown
Earthquake$24,758,496,507n/a62,431$182,801n/a$53,4820.000738%
Hail$13,133,514,613$14,710,53262,393$348,478$1,482$2,7240.00265%$0
Heat Wave$13,133,514,613$14,710,53262,393$371under $1$998,378under 0.0001%
Hurricane$13,081,084,675$14,135,13162,166$87,328$3,225$3,2500.000668%
Ice Storm$13,132,705,436n/a62,389$257,123n/a$57,3740.00196%
Inland Flooding$13,129,079,929$4,689,02913,040$20,975,585$118,070$274,955n/a (see note)$0NRI counts the full building value of any census block with some flood loss; this is not the value of buildings in the floodplain. Use local FIRM overlays for B2-a/B2-b.
Landslide$1,357,878,305n/a8,352$1,094n/a$31,323under 0.0001%
Lightning$13,133,514,613n/a62,393$20,554n/a$428,4190.000157%
Strong Wind$13,133,514,613$14,710,53262,393$224,622$125$383,9070.00171%$3,500$9,500Storm Events damage since the plan includes 3 zone-level Strong Wind records ($9,500): a NOAA non-thunderstorm wind type, outside NRI's Strong Wind definition.
Tornado$13,133,514,613$14,710,53262,393$493,685$82$205,2130.00376%
Wildfire$2,750,789,409$4,479,41514,955$3,011$2$1,1180.000109%
Winter Weather$13,133,514,613$14,710,53262,393$16,499$41$12,1770.000126%$0

Totals since 2026-02-11 (Storm Events through 2026-06-30): 15 county-coded records, 15 with a damage value recorded (including $0), $3,500; 5 zone-level records, 5 with a damage value recorded (including $0), $9,500 reported for the zone; Public Assistance: no counted declaration since the plan.

FEMA does not split Public Assistance by hazard. A declaration mapped to several hazards is listed under each of them with its full amount, so the per-hazard column does not add up to the total; the unit total counts each declaration once.

NRI computes earthquake exposure on its own basis, so it exceeds the county building value in B2-a.

Supports FEMA checklist item B2-a: vulnerability (county context)

County context

Source: 5

MeasureValue
Population62,393
Building value (total, not at risk)$13,133,514,613
Agriculture value (total, not at risk)$14,710,532
NRI risk rating (all hazards)Relatively Low
Expected annual loss, buildings and agriculture, all hazards$22,831,418
Expected annual loss, population equivalence, all hazards (NRI values each statistical life at $13.7M; a modeled value of expected deaths and injuries, not property damage)$2,635,674
Social vulnerability ratingRelatively Moderate
Community resilience ratingRelatively Moderate
NRI versionDecember 2025

FEMA's all-hazard expected annual loss adds buildings, agriculture and population equivalence; this table gives the property part and the population-equivalence part as separate rows.

Social vulnerability: higher means people are more likely to be harmed and slower to recover. Community resilience: lower means the community is less able to recover. High social vulnerability and low resilience both raise the NRI risk rating.

Supports FEMA checklist item B2-c: repetitive loss properties

Repetitive loss in this county, both definitions

Sources: 1, 4

DefinitionPropertiesSevere repetitive lossProperties
Repetitive loss, FMA definition (44 CFR 77.2)7Severe repetitive loss, FMA definition (44 CFR 77.2)7
Repetitive loss, NFIP insurance definition51Severe repetitive loss, NFIP insurance definition6

The state NFIP coordinator's list, the source FEMA's Handbook names, often uses the NFIP insurance definition (second row).

Repeat-flood properties: county and state-level rows

Sources: 1, 4

ScopeRL, FMApropertiesSRL, FMApropertiesRL, NFIPpropertiesSRL, NFIPpropertiesAny categorypropertiesMitigatedpropertiesCurrently insuredproperties
County total775165323
of which: Amesville village2120420
of which: Athens city0010100
of which: Chauncey village0191900
of which: Glouster village0171701
of which: Jacksonville village0020200
of which: Nelsonville city0020200
of which: Trimble village101101100
of which: Buchtel village (community ID not in plan data)0010100
of which: Athens County (unincorporated area)441641602
Statewide, no county in FEMA's file0010100

The statewide row counts properties FEMA's file gives with no county in this state; they are listed for reference and are not in this county's counts.

Repeat-flood properties by jurisdiction in the plan (NFIP community)

Sources: 1, 4

JurisdictionNFIP community IDRL, FMApropertiesSRL, FMApropertiesRL, NFIPpropertiesSRL, NFIPpropertiesAny categorypropertiesMitigatedpropertiesCurrently insuredproperties
Athens County390760441641602
Albany village3907270000000
Amesville village3900152120420
Athens city3900160010100
Chauncey village3900170191900
Coolville village3908220000000
Glouster village3900180171701
Jacksonville village3900190020200
Nelsonville city3900200020200
Trimble village390021101101100

Counts by occupancy group for each jurisdiction are in the Excel file, sheet "B2-c Jurisdictions".

Jurisdiction rows are whole NFIP communities and need not add up to the county total: a community that extends into another county is counted in full on each jurisdiction row, while the county table counts only its part in this county.

County repeat-flood properties by occupancy group

Sources: 1, 4

Occupancy groupRL, FMApropertiesSRL, FMApropertiesRL, NFIPpropertiesSRL, NFIPpropertiesAny categorypropertiesMitigatedpropertiesCurrently insuredproperties
single-family residential764154322
2 to 4 unit residential0000000
other residential0000000
non-residential011011001
not reported0000000

FEMA's occupancy groups have no institutional class; institutional properties are counted in non-residential or other residential in the table by occupancy group.

FMA RL and FMA SRL are the Flood Mitigation Assistance definitions (44 CFR 77.2), the ones the FEMA Local Mitigation Planning Policy Guide cites. NFIP repetitive loss (the FEMA insurance definition) is 2 or more claims over $1,000 in 10 years, and a property can leave that group once it is mitigated. Also shown: NFIP severe repetitive loss, any category, mitigated and currently insured. The Methods page gives the OpenFEMA field details.

Counts are aggregates of FEMA's public NFIP Multiple Loss Properties file (FEMA's data date 2026-08-02; file version 2026-08-04). No property is identified. County assignment is FEMA's geocode.

In this county 2 properties are FMA repetitive loss but not NFIP repetitive loss, and 46 properties are NFIP repetitive loss but not FMA repetitive loss.

Exact counts; no count suppression.

Sources

Tables cite these sources by number. The full list, for the plan's bibliography (FEMA review item A4-a):

  1. FEMA, OpenFEMA HazardMitigationPlanStatuses v1, version 2026-09-29T134039Z, pulled 2026-09-30, https://www.fema.gov/api/open/v1/HazardMitigationPlanStatuses (API)
  2. FEMA, OpenFEMA DisasterDeclarationsSummaries v2, version 2026-09-29T162832Z, pulled 2026-09-30, https://www.fema.gov/api/open/v2/DisasterDeclarationsSummaries (API)
  3. FEMA, OpenFEMA PublicAssistanceFundedProjectsSummaries v1, version 2026-09-29T150754Z, pulled 2026-09-30, https://www.fema.gov/api/open/v1/PublicAssistanceFundedProjectsSummaries (API)
  4. FEMA, OpenFEMA NfipMultipleLossProperties v1, version 2026-08-04T164045Z, pulled 2026-09-30, https://www.fema.gov/api/open/v1/NfipMultipleLossProperties (API)
  5. FEMA, FEMA National Risk Index 1.20.0 (December 2025), county and census tract tables, version 1.20.0, pulled 2026-09-30, https://www.fema.gov/about/reports-and-data/openfema/nri/v120/NRI_Table_Counties.zip (download, 25 MB), https://www.fema.gov/about/reports-and-data/openfema/nri/v120/NRI_Table_CensusTracts.zip (download, 635 MB)
  6. NOAA NCEI, NOAA NCEI Storm Events Database, details files (csvfiles v1.0), version c20260918, pulled 2026-09-30, https://www.ncei.noaa.gov/pub/data/swdi/stormevents/csvfiles/
  7. NOAA National Weather Service, NWS county-public forecast zones correlation file, version bp03mr20 to bp16ap26 (11 files; newest bp16ap26), pulled 2026-09-30, https://www.weather.gov/gis/ZoneCounty
  8. U.S. Census Bureau, Census 2024 Gazetteer, 2020 place by county, CT county-to-cousub crosswalk, version 2024-gazetteer, pulled 2026-09-30, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_counties_national.zip, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_cousubs_national.zip, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_place_national.zip, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_unsd_national.zip, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_elsd_national.zip, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_scsd_national.zip, https://www2.census.gov/geo/docs/reference/codes2020/national_place_by_county2020.txt, https://www2.census.gov/geo/docs/reference/ct_change/ct_cou_to_cousub_crosswalk.xlsx (used to match place names and codes; no table prints its values)

What this packet is and what the plan adds

This packet is the federal data for the plan's risk assessment (the summary on page 1 says how it is organized); the plan and FEMA's review decide whether each item is met.

The plan adds what only the community has: local data on assets, critical facilities, development and each jurisdiction's impacts; local hazard history, including state-declared emergencies; the mitigation strategy; and adoption.

How the federal data are built: National Risk Index values are FEMA's model, not counts of events. Storm Events is more complete from 1996; zone-level records are placed by forecast zone, not by location in the county. Public Assistance for a jurisdiction is matched by applicant name. The Methods page gives every rule and the known edge cases.

OpenFEMA disclaimer

This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).

Reuse, citation and corrections

Reuse and citation: Hazard Plain text and tables are licensed under Creative Commons Attribution 4.0 International (CC BY 4.0, https://creativecommons.org/licenses/by/4.0/); credit Hazard Plain and the release. The underlying federal data are public domain; OpenFEMA data are also subject to the OpenFEMA terms and conditions.

Cite this: Hazard Plain (2026). Athens County, OH: risk-assessment baseline packet, release 2026-10 (data as of 2026-09-30; County FIPS 39009). Automated baseline. https://hazardplain.org/oh/39009/ Built from FEMA OpenFEMA, the FEMA National Risk Index and NOAA NCEI Storm Events; source versions in the packet's Sources list.

Corrections: to report an error, name the packet, the table and what your records show. Contact: [email protected]