Hazard Plain Automated baseline

Brazos County, TX

Risk-assessment baseline packet

County FIPS:
48041
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 2031-03-08. Plan: Brazos County (FEMA plan 109914), approved 2026-03-09.

Since the plan was approved on 2026-03-09: no new federal declaration.

NOAA Storm Events records since that date: 3 records (data through 2026-06-30).

Highest expected annual loss (FEMA National Risk Index, modeled total; see B1-a): Inland Flooding ($18,884,351 a year), Cold Wave ($15,137,175) and Tornado ($14,582,112).

Repetitive-loss flood properties now: FMA RL 7, SRL 9 (44 CFR 77.2); any definition: 60.

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 2031-03-08
Plan:
Brazos County (FEMA plan 109914)
Approved:
2026-03-09
Days to expiry:
1,620

What changed since your last plan (approved 2026-03-09)

New federal declarations:
none
Storm Events records since approval:
3 records (data through 2026-06-30)
Repetitive loss now:
FMA RL 7, SRL 9 (44 CFR 77.2); any definition: 60
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 expiryNotes
Brazos CountyCountyApproved, expires 2031-03-08Brazos County (FEMA plan 109914)2026-03-092031-03-081,620
Bryan cityCityApproved, expires 2031-03-08Brazos County (FEMA plan 109914)2026-03-092031-03-081,620this jurisdiction approved 2026-05-04
College Station cityCityApproved, expires 2031-03-08Brazos County (FEMA plan 109914)2026-03-092031-03-081,620this jurisdiction approved 2026-05-20
Kurten townTownApproved, expires 2031-03-08Brazos County (FEMA plan 109914)2026-03-092031-03-081,620
Wixon Valley cityCityApproved, expires 2031-03-08Brazos County (FEMA plan 109914)2026-03-092031-03-081,620this jurisdiction approved 2026-05-19
Texas A&M UniversityCollege/UniversityApproved, expires 2031-03-08Brazos County (FEMA plan 109914)2026-03-092031-03-081,620this jurisdiction approved 2026-05-04

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$18,521,013$158$363,180$18,884,35151
2Cold WaveRelatively HighRelatively High$65,193$87,007$14,984,976$15,137,1751
3TornadoRelatively HighRelatively High$3,193,290$2,354$11,386,468$14,582,11217
4HurricaneRelatively ModerateRelatively Moderate$3,105,405$277,515$193,824$3,576,7443
5Heat WaveRelatively ModerateRelatively Moderate$291$372$3,007,806$3,008,47012
6LightningVery HighRelatively High$18,661n/a$2,296,307$2,314,9689
7Strong WindRelatively HighRelatively High$289,839$27,785$1,350,590$1,668,214140Includes 1 High Wind record (a NOAA non-thunderstorm wind type, outside NRI's Strong Wind definition).
8HailRelatively ModerateRelatively Moderate$1,217,561$59,780$122,478$1,399,819141
9DroughtRelatively ModerateRelatively Moderaten/a$1,049,997n/a$1,049,99713
10Ice StormRelatively HighRelatively High$55,449n/a$443,454$498,9036
11Winter WeatherRelatively HighRelatively High$34,069$59$319,360$353,48714
12EarthquakeVery LowVery Low$111,302n/a$33,572$144,874Storm Events does not record earthquakes.
13WildfireVery LowVery Low$45,129$291$19,522$64,9420Declared 4 times; no Storm Events record of this type.
14LandslideVery LowVery Low$220n/a$3$2230No 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 wildfire and landslide 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 20.17 (Relatively Low, 47.7); tract 8 (Very Low, 25.2); tract 11.01 (Very Low, 23.7)
Hurricanetract 20.17 (Relatively High, 91.2); tract 1.04 (Relatively Moderate, 81.8); tract 20.10 (Relatively Moderate, 81.3)
Landslidetract 2.05 (Very Low, 73.8); tract 2.07 (Very Low, 73.7); tract 20.10 (Very Low, 73.4)
Tornadotract 21 (Very High, 99.7); tract 20.17 (Very High, 99.5); tract 20.21 (Very High, 94.3)
Wildfiretract 1.04 (Relatively Low, 84.7); tract 1.06 (Relatively Low, 83.3); tract 1.03 (Relatively Low, 82.9)

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 20.17 is Census Tract 20.17). 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 chill1 record, 2021 (1 zone-level)2 days; 1 with a recorded value2 consecutive days, 2021-02-15 to 2021-02-16, zone-levelCountywide (zone-level records).Wind chill: in event narratives only (local data needed).
Frost/Freeze (outside NRI's Cold Wave definition)crop damage0Temperature: in event narratives only (local data needed).
DroughtU.S. Drought Monitor scale (D0 to D4)13 records, 1996 to 2023 (13 zone-level)13 days to 123 days (median 61 days); 6 with a recorded value123 days (4 months), 1998-05-01 to 1998-08-31, a run of 4 consecutive Storm Events drought records, zone-levelDrought, 1998-08-01, $1,000,000 property; $7,300,000 crops, reported for the zone (1998 dollars)Countywide (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)176 records, 1956 to 20260.7 in to 4.5 in (median 1 in); 176 with a recorded value4.5 in hail, 1999-01-22Event records naming jurisdictions in the plan: College Station city (64 records), Bryan city (36 records), Kurten town (3 records).
Excessive Heat, Heatheat index (in event narratives)12 records, 1999 to 2023 (12 zone-level)1 day to 31 days (median 5 days); 11 with a recorded valueAugust 1999 (1 monthly summary record), zone-levelCountywide (zone-level records).Heat index: in event narratives only (local data needed).
Hurricane, Tropical Storm, Tropical DepressionSaffir-Simpson3 records, 1998 to 2017 (3 zone-level)Strongest recorded: Tropical Storm record, 2017-08-25 to 2017-08-29, $15,000,000 property; crops not reported (2017 dollars); NWS zone TXZ196Countywide (zone-level records).Storm 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)6 records, 1997 to 2022 (6 zone-level)Ice Storm, 2000-12-13, $200,000 property; crops not reported (2000 dollars); NWS zone TXZ196Countywide (zone-level records).Ice thickness: in event narratives only (local data needed).
Flash Flood, Flood, Lakeshore Flooddamage and flood days (flood depth: FIRM)51 records, 1997 to 2026 (2 zone-level)Flash Flood, 2000-11-03, $1,000,000 property; crops not reported (2000 dollars)Event records naming jurisdictions in the plan: Bryan city (12 records), College Station city (12 records), Kurten town (4 records). Zone-level records (2) 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)0Physical measure: in event narratives only (local data needed).
Lightningannualized frequency (the measure FEMA's Local Mitigation Planning Handbook names)9 records, 2008 to 2024Lightning, 2024-06-27, $0 property; $0 crops (2024 dollars), 1 direct deathLightning, 2014-05-27, $35,000 property; $0 crops (2014 dollars)Event records naming jurisdictions in the plan: College Station city (5 records), Bryan city (2 records).Storm Events lists lightning with damage or casualties; physical measure in event narratives only (local data needed).
High Wind and Strong Wind (outside NRI's Strong Wind definition)wind speed (kt and mph)1 record, 2025 (1 zone-level)53 kt (61 mph); 1 with a recorded value53 kt (61 mph) measured gust, High Wind, 2025-03-04; NWS zone TXZ196Countywide (zone-level records).
Thunderstorm Windwind speed (kt and mph)182 records, 1955 to 202648 kt (55 mph) to 78 kt (90 mph) (median 53 kt (61 mph)); 142 with a recorded value78 kt (90 mph) estimated gust, Thunderstorm Wind, 2009-07-19; same speed and measurement basis also recorded on 2007-04-25Thunderstorm Wind, 2007-04-25, $250,000 property; $0 crops (2007 dollars)Event records naming jurisdictions in the plan: Bryan city (45 records), College Station city (36 records), Kurten town (11 records).
TornadoEnhanced Fujita (Fujita before Feb 2007)29 records, 1953 to 2022F/EF0 to F/EF3 (median F/EF0); 29 with a recorded valueF3 tornado, 1956-04-05, 5.2 mi path length (whole path, pre-1996), 67 yd wide, $250,000 property; crops not recorded (1956 dollars)Tornado, 2016-05-26, $7,000,000 property; crops not reported (2016 dollars)Event records naming jurisdictions in the plan: College Station city (5 records), Bryan city (3 records), Kurten town (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)0Acres burned: in event narratives only (local data needed).
Winter Storm, Heavy Snow, Blizzard, Lake-Effect Snow, Winter Weather, Sleetnone in data (snowfall: local data)14 records, 1998 to 2026 (14 zone-level)Winter Weather, 2014-02-06, $50,000 property; crops not reported (2014 dollars); NWS zone TXZ196Countywide (zone-level records).Snow depth: in event narratives only (local data needed).

Storm Events records are more complete after 1996; before 1996 only Tornado (from 1950), Hail and Thunderstorm Wind (from 1955) exist. Zone-level records whose zone 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 11 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 dollarsFlagsNotes
2024-07-092024-07-05DR-4798-TXMajor disasterHurricane BerylHurricaneno Public Assistance recordedwithin last 5 years
2021-02-192021-02-11DR-4586-TXMajor disasterSevere Winter StormsIce Storm$750,681.81
2021-02-142021-02-11EM-3554-TXEmergencySevere Winter StormIce Stormno Public Assistance recordedsame incident as DR-4586
2020-03-252020-01-20DR-4485-TXMajor disasterCOVID-19 PandemicNon-natural, not counted$96,967.95
2020-03-132020-01-20EM-3458-TXEmergencyCOVID-19Non-natural, not countedno Public Assistance recordedsame incident as DR-4485
2016-06-112016-05-22DR-4272-TXMajor disasterSevere Storms and FloodingInland Flooding$901,986.92
2008-09-132008-09-07DR-1791-TXMajor disasterHurricane IkeHurricane (primary); also designated: Inland Flooding$533,046.53
2008-09-102008-09-07EM-3294-TXEmergencyHurricane IkeHurricaneno Public Assistance recordedsame incident as DR-1791
2008-08-292008-08-27EM-3290-TXEmergencyHurricane GustavHurricaneno Public Assistance recorded
2008-03-142008-03-14EM-3284-TXEmergencyWildfiresWildfireno Public Assistance recorded
2006-01-112005-11-27DR-1624-TXMajor disasterExtreme Wildfire ThreatWildfire$9,759.17
2005-09-242005-09-23DR-1606-TXMajor disasterHurricane RitaHurricane: evacuation support (county designated for sheltering evacuees, no Individual Assistance), not a local hazard event; not counted$30,912.21
2005-09-212005-09-20EM-3261-TXEmergencyHurricane RitaHurricane: evacuation support (county designated for sheltering evacuees, no Individual Assistance), not a local hazard event; not counted$28,682.99same incident as DR-1606
2005-09-022005-08-29EM-3216-TXEmergencyHurricane Katrina EvacuationHurricane: evacuation support, not a local hazard event; not counted$1,326,338.41
1999-09-011999-08-01EM-3142-TXEmergencyExtreme Fire HazardsWildfireno Public Assistance recorded
1998-08-261998-08-22DR-1239-TXMajor disasterTropical Storm CharleyHurricane; Inland Flooding: designated for Hazard Mitigation only (no Public or Individual Assistance for this county); not countedPA not declared for this county
1994-10-181994-10-14DR-1041-TXMajor disasterSevere Thunderstorms and FloodingInland FloodingPA not declared for this county
1993-09-101993-08-30EM-3113-TXEmergencyExtreme Fire HazardDrought (primary); also designated: Wildfireno Public Assistance recorded
1991-12-261991-12-20DR-930-TXMajor disasterSevere ThunderstormsInland 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
1998-06-231998-06-04EM-3127-TXEmergencyFireWildfire
1963-09-241963-09-24DR-159-TXMajor disasterHurricane CindyHurricane (primary); also designated: Inland Flooding
1961-09-161961-09-16DR-118-TXMajor disasterHurricane CarlaHurricane (primary); also designated: Inland Flooding
1960-07-151960-07-15DR-103-TXMajor disasterHeavy Rains, Hail, Floods & TornadoesHail; Inland Flooding; Tornado
1959-07-081959-07-08DR-93-TXMajor disasterFloodsInland Flooding
1958-06-061958-06-06DR-85-TXMajor disasterTornadoes, Rain, Hail & FloodsTornado (primary); also designated: Hail, Inland Flooding
1957-04-291957-04-29DR-72-TXMajor disasterHurricane, Rain, Wind, Hail & FloodsHurricane (primary); also designated: Hail, Inland Flooding
1954-07-011954-07-01DR-18-TXMajor disasterFloodInland Flooding
1953-06-191953-06-19DR-9-TXMajor disasterFloodInland Flooding
1953-05-151953-05-15DR-2-TXMajor disasterTornado & Heavy RainfallTornado

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.

91 Fire Management declarations (1988-03-12 to 2009-04-10) FEMA filed as Statewide with no county; each names one local fire. Listed on the state page.

Public Assistance not placed in any Texas county: 1 row, $902,084.65; listed on the Texas 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 Wave1000001996 to 2026-06-30
Drought13004101996 to 2026-06-30
Earthquake000000Storm Events does not record earthquakes; the USGS earthquake catalog is the source.
Hail17613342001955 to 2026-06-30
Heat Wave12006001996 to 2026-06-30
Hurricane3000301996 to 2026-06-30
Ice Storm6001101996 to 2026-06-30
Inland Flooding51126401996 to 2026-06-30
Landslide0000001996 to 2026-06-30No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events
Lightning9002001996 to 2026-06-30
Strong Wind1831135001955 to 2026-06-30Includes 1 High Wind record.
Tornado29001001950 to 2026-06-30
Wildfire0000401996 to 2026-06-30No Storm Events records of this type; 4 federal declared incidents (see declarations table)
Winter Weather14012001996 to 2026-06-30

Notable Storm Events records

Sources: 1, 6, 7

DateEvent typeMagnitude or extentDamagenominal dollarsDeaths, injuriesdirect onlyLocationFlagsWhy listed
2025-03-04High Wind53 kt (61 mph) measured gust$0 property; $0 crops, reported for the zone (2025 dollars)0, 0NWS zone TXZ196 (BRAZOS), zone-levelwithin last 5 yearsB1-c worst recorded: High Wind and Strong Wind
2024-06-27Lightning$0 property; $0 crops (2024 dollars)1, 0BRYAN COULTER ARPTwithin last 5 yearsdeaths or injuries recorded
2021-02-15Extreme Cold/Wind Chill$108,000 property; crops not reported, reported for the zone (2021 dollars)0, 0NWS zone TXZ196 (BRAZOS), zone-levelB1-c worst recorded: Cold/Wind Chill, Extreme Cold/Wind Chill
2017-08-25Tropical Storm$15,000,000 property; crops not reported, reported for the zone (2017 dollars)0, 0NWS zone TXZ196 (BRAZOS), zone-levelB1-c worst recorded: Hurricane, Tropical Storm, Tropical Depression
2009-07-19Thunderstorm Wind78 kt (90 mph) estimated gust$10,000 property; $0 crops (2009 dollars)0, 0WELLBORNB1-c worst recorded: Thunderstorm Wind
2008-07-08Lightning$0 property; $0 crops (2008 dollars)0, 2BRYANdeaths or injuries recorded
2006-12-29TornadoF1, 4.5 mi within this county, 200 yd wide$2,750,000 property; $0 crops (2006 dollars)0, 3COLLEGE STATIONdeaths or injuries recorded
2000-11-03Flash Flood$1,000,000 property; crops not reported (2000 dollars)0, 0COUNTYWIDEB1-c worst recorded: Flash Flood, Flood, Lakeshore Flood
1999-08-01Heatdamage not reported0, 0NWS zone TXZ196 (BRAZOS), zone-levelB1-c worst recorded: Excessive Heat, Heat
1999-01-22Hail4.5 in$10,000,000 property; crops not reported (1999 dollars)0, 0COLLEGE STATIONB1-c worst recorded: Hail
1998-05-01Droughtdamage not reported0, 0NWS zone TXZ196 (BRAZOS), zone-levelB1-c worst recorded: Drought
1956-04-05TornadoF3, 5.2 mi path length (whole path, pre-1996), 67 yd wide$250,000 property; crops not recorded (1956 dollars)0, 0location not recordedB1-c worst recorded: Tornado

The full list is in the Excel file, sheet "B1-d Storm Events history" (497 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).

Tribal and special-area declarations in this state are listed on the state page.

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 Wave0.947event-days per yearabout 0.947 days per yearPossible (from Storm Events: 1 of 30 years)event-days in 1 of 30 years, 1996 to 2025 (3.33%)182005-11-12 to 2024-11-12 (19 years)countywide
Drought30.3event-days per yearabout 30.3 days per yearLikely (from Storm Events: 5 of 30 years)event-days in 5 of 30 years, 1996 to 2025 (16.7%)1,0222000 to 2025 (25.25 years; D3 and D4 only)countywide
Earthquake0.000554annual probability at a locationchance a given location in the county has at least minor-damage shaking in a year: 0.0554%not shownmodeledsee B1-fNo descriptor (Storm Events does not record earthquakes).
Hail2.36events per yearabout 2.36 per yearHighly likelyFEMA annualized frequency (modeled)89.5 (modeled)1986 to 2023 (38 years)countywide
Heat Wave11.6event-days per yearabout 11.6 days per yearLikely (from Storm Events: 4 of 30 years)event-days in 4 of 30 years, 1996 to 2025 (13.3%)1882005-11-12 to 2024-11-12 (19 years)countywide
Hurricane0.0811events per yearabout 1 in 12 yearsPossibleFEMA annualized frequency (modeled)251851 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 Storm0.849event-days per yearabout 0.849 days per yearLikely (from Storm Events: 6 of 30 years)event-days in 6 of 30 years, 1996 to 2025 (20%)581946-12-31 to 2014-02-12 (67 years)countywide
Inland Flooding1.18event-days per yearabout 1.18 days per yearLikely (from Storm Events: 18 of 30 years)event-days in 18 of 30 years, 1996 to 2025 (60%)331996 to 2023 (28 years)see B1-f
Landslide0.0845events per year (modeled)about 1 in 12 yearsPossibleFEMA annualized frequency (modeled)not shownmodeledsee B1-f
Lightning59.9days per year with a strikeabout 59.9 days per yearHighly likelyFEMA annualized frequency (modeled)not shown1995 to 2023 (29 years; CONUS)countywide
Strong Wind1.48events per yearabout 1.48 per yearHighly likelyFEMA annualized frequency (modeled)571986 to 2023 (38 years)countywide
Tornado0.328events per yearabout 1 in 3 yearsLikelyFEMA annualized frequency (modeled)not shown1950 to 2023 (EF2+); 1986 to 2023 (EF0-1)see B1-f
Wildfire0.00119annual probability at a locationchance a given location in the county burns in a year: 0.119%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 Weather2.53event-days per yearabout 2.53 days per yearLikely (from Storm Events: 9 of 30 years)event-days in 9 of 30 years, 1996 to 2025 (30%)482005-11-12 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 202596303.2
Hail2.00 in+1996 to 20258300.267
Thunderstorm Wind (counted as NRI Strong Wind)50-64 kt1996 to 2025118303.93
Thunderstorm Wind (counted as NRI Strong Wind)65 kt+1996 to 20255300.167
Thunderstorm Wind (counted as NRI Strong Wind)unmeasured or below 50 kt1996 to 202515300.5
TornadoEF0-11996 to 202516300.533
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 Wave63 of 6316.187.499.6Very High 3, Relatively High 49, Relatively Moderate 10, Very Low 1
Drought5 of 6369.390.199.2Relatively High 2, Relatively Low 2, Very Low 1, No Rating 58
Earthquake63 of 631.09.747.7Relatively Low 1, Very Low 62
Hail63 of 6321.967.897.0Relatively High 1, Relatively Moderate 27, Relatively Low 34, Very Low 1
Heat Wave63 of 631.760.095.0Relatively High 1, Relatively Moderate 35, Relatively Low 26, Very Low 1
Hurricane63 of 6342.067.391.2Relatively High 1, Relatively Moderate 7, Relatively Low 54, Very Low 1
Ice Storm63 of 631.364.693.0Relatively High 1, Relatively Moderate 23, Relatively Low 37, Very Low 2
Inland Flooding63 of 630.316.094.4Relatively High 1, Relatively Moderate 9, Relatively Low 23, Very Low 30
Landslide51 of 638.625.073.8Very Low 51, No Rating 12
Lightning63 of 630.487.499.8Very High 6, Relatively High 39, Relatively Moderate 16, Relatively Low 1, Very Low 1
Strong Wind63 of 633.863.494.8Relatively High 2, Relatively Moderate 44, Relatively Low 16, Very Low 1
Tornado63 of 636.478.199.7Very High 3, Relatively High 37, Relatively Moderate 21, Relatively Low 1, Very Low 1
Wildfire59 of 6318.431.684.7Relatively Low 14, Very Low 45, No Rating 4
Winter Weather63 of 6314.270.496.7Very High 1, Relatively High 10, Relatively Moderate 47, Relatively Low 4, Very Low 1

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
Brazos CountyCountyApproved, expires 2031-03-08FMA RL 1, SRL 0; any 9$1,365,583.120 total; 0 since its planIncludes $972,086.04 for declarations not counted as hazard incidents (EM-3216-TX, EM-3261-TX).
Bryan cityCityApproved, expires 2031-03-08FMA RL 5, SRL 7; any 43$1,351,795.9898 total; 0 since its planIncludes $186,518.38 for declarations not counted as hazard incidents (DR-1606-TX, DR-4485-TX, EM-3216-TX, EM-3261-TX).
College Station cityCityApproved, expires 2031-03-08FMA RL 1, SRL 2; any 8$880,473.28122 total; 1 since its planIncludes $298,012.59 for declarations not counted as hazard incidents (DR-1606-TX, EM-3216-TX, EM-3261-TX).
Kurten townTownApproved, expires 2031-03-08FMA RL 0, SRL 0; any 0no Public Assistance recorded19 total; 0 since its plan
Wixon Valley cityCityApproved, expires 2031-03-08FMA RL 0, SRL 0; any 0no Public Assistance recorded0 total; 0 since its plan

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

School districts and special districts get a plan clock row only.

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
  • Texas A&M Forest Service TxWRAP for wildfire risk; Texas State Hazard Mitigation Plan hazard list for B1-a exclusions.

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 2026-03-09county-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$37,230,158,766$118,000,528233,555$65,193$87,007$14,984,9760.000175%
Droughtn/a$17,246,181n/an/a$1,049,997n/a6.09% (agriculture)NRI has no building exposure for this hazard; agriculture shown
Earthquake$67,788,881,109n/a233,849$111,302n/a$33,5720.000164%
Hail$37,230,161,550$118,000,528233,555$1,217,561$59,780$122,4780.00327%$0
Heat Wave$37,230,158,766$118,000,528233,555$291$372$3,007,806under 0.0001%
Hurricane$37,223,335,949$117,597,925233,473$3,105,405$277,515$193,8240.00834%
Ice Storm$37,230,158,766n/a233,555$55,449n/a$443,4540.000149%
Inland Flooding$37,194,043,360$39,489,6294,628$18,521,013$158$363,180n/a (see note)$20,000NRI 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$47,723,441n/a280$220n/a$30.000462%
Lightning$37,230,161,550n/a233,555$18,661n/a$2,296,307under 0.0001%
Strong Wind$37,230,161,550$118,000,528233,555$289,839$27,785$1,350,5900.000779%$5,000
Tornado$37,230,161,550$118,000,528233,555$3,193,290$2,354$11,386,4680.00858%
Wildfire$1,931,877,290$32,659,13125,519$45,129$291$19,5220.00234%
Winter Weather$37,230,158,766$118,000,528233,555$34,069$59$319,360under 0.0001%

Totals since 2026-03-09 (Storm Events through 2026-06-30): 3 county-coded records, 3 with a damage value recorded (including $0), $25,000; 0 zone-level records, 0 with a damage value recorded (including $0), $0 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
Population233,555
Building value (total, not at risk)$37,230,161,550
Agriculture value (total, not at risk)$118,000,528
NRI risk rating (all hazards)Relatively Moderate
Expected annual loss, buildings and agriculture, all hazards$28,162,740
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)$34,521,539
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)9
Repetitive loss, NFIP insurance definition59Severe repetitive loss, NFIP insurance definition8

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 total7959860119
of which: Bryan city5743743015
of which: College Station city1271812
of which: Brazos County (unincorporated area)1090902
Statewide, no county in FEMA's file381271319

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
Brazos County4811951090902
Bryan city4800825743743015
College Station city4800831271812
Kurten town4805890000000
Wixon Valley city4816360000000

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 residential7752752017
2 to 4 unit residential0030301
other residential0211210
non-residential0030301
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 0 properties are FMA repetitive loss but not NFIP repetitive loss, and 52 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, organized by the items of FEMA's Local Mitigation Plan Review Tool, Element B. Each section heading names the item its tables support; the plan and FEMA's review decide whether the 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). Brazos County, TX: risk-assessment baseline packet, release 2026-10 (data as of 2026-09-30; County FIPS 48041). Automated baseline. https://hazardplain.org/tx/48041/ 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: contact@hazardplain.org

Hazard Plain release 2026-10. As of 2026-09-30; Storm Events data through 2026-06-30. Automated baseline.