Bexar County, TX Environment & Hazard Risk

• HailVery High$72.33M/yr expected annual loss, about 3.0 events a year
• TornadoVery High$124M/yr expected annual loss, about once every 2 years
• Heat waveRelatively High$39.19M/yr expected annual loss, about 10 events a year
• LightningRelatively High$1.94M/yr expected annual loss, about 46 events a year
• Cold waveRelatively High$9.51M/yr expected annual loss, about once every 2 years
• WildfireRelatively Moderate$1.75M/yr expected annual loss, about once every 978 years
• Winter weatherRelatively High$311K/yr expected annual loss, about 2.8 events a year
• Strong windRelatively High$1.5M/yr expected annual loss, about once every 1 year
• LandslideRelatively Low$26.25K/yr expected annual loss, about once every 5 years
• HurricaneRelatively Moderate$2.71M/yr expected annual loss, about once every 28 years
• Ice stormRelatively Moderate$324K/yr expected annual loss, about once every 5 years
• DroughtRelatively Moderate$435K/yr expected annual loss, about 81 events a year
• EarthquakeRelatively Low$437K/yr expected annual loss, about once every 3,195 years

Bars show the national percentile score (0 to 100) for each hazard. Dollar figures are expected annual losses to buildings, people and crops. Not rated here: avalanche, coastal flooding, riverine flooding, tsunami, volcanic activity.

Check the flood zone for an address

Homes with flood insurance

4,411 of 567,488 (0.8%)

Homes in high-risk flood zones

6,137

Insured in high-risk zones

1,745 (28%)

Flood claims since 1978

2,309

Claims paid since 1978

$33.81M

• Hail473
• Flash Flood427 · 48 deaths
• Thunderstorm Wind209
• Drought85
• Flood46 · 1 death
• Tornado32
• Winter Weather18
• Winter Storm15
• Excessive Heat8
• Lightning8 · 3 deaths

• Hail4.5" hail04/13/2016

  Grey Forest, Bexar County

  $1.36B damage

  What happened

  A thunderstorm produced 4.5 inch hail near Tezel Rd. and Bandera Rd. in northwestern San Antonio. This tied for the largest hailstone ever reported in Bexar County. The hail storm storm moved across northern Bexar County, crossing the northern half of San Antonio. Damage costs in San Antonio are estimated at $1.36 billion making this the costliest hail storm ever in the state of Texas according to the Insurance Council of Texas. Estimates do not include uninsured or commercial losses which will likely push the losses to near 2 billion, especially when including 2 other hail storms that occurred over the same area of Bexar County at the end of the April. Estimates provided by the Insurance Council of Texas and include damage to 136,000 vehicles and 125,000 homes.

• Flash Flood10/17/1998

  Countywide, Bexar County

  11 deaths, 600 injured, $8.1M damage

  What happened

  The Great October FloodIn advance of a very slow-moving upper level trough of low pressure over West Texas, a cold front drifted slowly southeastward into West Central Texas during the evening of Friday, October 16th. Deep moisture was in place across South Central Texas as the two systems approached, being fed at the mid and upper levels by two nearly stationary hurricanes, Madeline near the tip of Baja Mexico, and Lester, anchored just off Acapulco, Mexico, and in the low levels by a strong flow from the Gulf of Mexico. A very moisture-rich environment was in place across South Central Texas as the event developed. Near 3 am CST, with the cold front still west of San Angelo, scattered showers and thunderstorms began to break out over Bexar County beneath the mid and upper level moisture plume. They quickly became widespread as a low level rain-cooled boundary formed along the south and east edge of the county. It was upon this boundary that subsequent showers and thunderstorms continued to form. By 6 am CST, rainfall of up to 4 inches had been reported in Western Bexar County, with amounts approaching 4 inches in Western Comal County. By 8 am CST that morning, heavy...

• Heat06/27/2022

  Bexar

  53 deaths

  What happened

  Temperatures were unusually hot on the 27th with high temperatures in the San Antonio area ranging from 100-103 degrees (the normal high is 93). Sixty-seven people were found in a tractor-trailer on the southwest side of San Antonio. Fifty-three people died of heat related illnesses. Forty-eight people died at the scene and five others died after being taken to hospitals. Forty of the victims were male and 13 were female. Their ages were not released.

• Hail4" hail05/07/2001

  San Antonio, Bexar County

  $150M damage

  What happened

  This storm eventually developed into one of the most devastating hail-and-wind storms in the history of Bexar County. Hail in sizes up to to 4 inches, accompanied at times by winds estimated to be over 60 mph, destroyed roofs of hundreds of homes, and severely damaged hundreds of vehicle bodies, as well as breaking thousands of windows in houses and vehicles. The damage was reported to have been the worst in the northwestern part of the city, where hail reached at least 4 inches in diameter. Damages were estimated to reach at least $60,000,000 for homes, and an additional $60,000,000 for cars. Additional severe thunderstorm winds struck the western part of the county just before 8 pm and destroyed around a dozen power lines along Grissom Road near Culebra.

• Flash Flood06/12/2025

  Longhorn, Bexar County

  11 deaths, $23M damage

  What happened

  Training of thunderstorms with intense rainfall rates produced a swath of 3-8 inches of rain across San Antonio. Several vehicles were swept off the Loop 410 access road into Beitel Creek. There were 11 fatalities in this creek and the surrounding area. Ten people were rescued from the water, and two others were able to get to safety on their own. Damage from the flooding totaled $23 million across Bexar County.

• Heat07/22/2017

  Bexar

  10 deaths, 29 injured

  What happened

  Thirty-nine people were discovered in a hot semi-trailer just after��midnight��on Sunday, July 23rd in southwestern San Antonio. The San Antonio Fire Department reported that 8 people died at the scene. Two others died after being taken to hospitals. Twenty-nine others were treated for heat related illnesses. High temperatures ranged from 100-104 degrees across the San Antonio metro area on Saturday, July 22nd. Peak heat index values were estimated to have been around 101-105 degrees.

• TornadoEF0, 0.12 mi path, 30 yd wide07/15/2026

  Sayers, Bexar County

• Flood07/15/2026

  Luxello, Bexar County

• TornadoEF0, 3.95 mi path, 200 yd wide07/15/2026

  Beckmann, Bexar County

  $600K damage

• TornadoEF0, 0.3 mi path, 30 yd wide07/15/2026

  San Antonio, Bexar County

• Flash Flood07/15/2026

  Leon Vly, Bexar County

• Flash Flood07/15/2026

  Leon Vly, Bexar County

• Flash Flood07/14/2026

  Luxello, Bexar County

• Flash Flood07/11/2026

  Beckmann, Bexar County

• Tropical Storm Hermine (2010)09/05/2010 · Landfall: TX · 989 mbTropical storm52 mph nearby
• Unnamed storm (1942)08/23/1942 · Landfall: TX · 950 mbCategory 298 mph nearby
• Unnamed storm (1929)06/27/1929 · Landfall: TX · 982 mbCategory 175 mph nearby
• Unnamed storm (1886)08/12/1886 · Landfall: TX · 925 mbCategory 298 mph nearby

• San Antonio Water SystemServes 2,643,729 · Purchased surface water · Local governmentNo health violations
• Jbsa Sam HoustonServes 37,563 · Groundwater · Federal1 health violation+2 monitoring or reporting
• City of ConverseServes 29,709 · Purchased surface water · Local governmentNo health violations
• East Central SudServes 26,137 · Purchased surface water · Local governmentNo health violations
• Jbsa LacklandServes 20,907 · Groundwater · FederalNo health violations+1 monitoring or reporting
• City of Universal CityServes 20,119 · Groundwater · Local governmentNo health violations+1 monitoring or reporting
• Atascosa Rural WscServes 13,857 · Purchased surface water · Local government11 health violations+18 monitoring or reporting
• City of SelmaServes 11,418 · Groundwater · Local governmentNo health violations+3 monitoring or reporting