Dimmit County, TX Environment & Hazard Risk

• Heat waveRelatively Moderate$3.3M/yr expected annual loss, about 7.1 events a year
• DroughtRelatively Moderate$537K/yr expected annual loss, about 106 events a year
• HurricaneRelatively Low$137K/yr expected annual loss, about once every 23 years
• WildfireVery Low$33.7K/yr expected annual loss, about once every 698 years
• Cold waveRelatively Low$551K/yr expected annual loss, about once every 3 years
• LightningRelatively Low$86.6K/yr expected annual loss, about 35 events a year
• TornadoRelatively Low$250K/yr expected annual loss, about once every 10 years
• Ice stormVery Low$13.8K/yr expected annual loss, about once every 16 years
• HailVery Low$45.6K/yr expected annual loss, about once every 1 year
• Winter weatherVery Low$5,914/yr expected annual loss, about 1.1 events a year
• EarthquakeVery Low$4,634/yr expected annual loss, about once every 5,405 years
• Strong windVery Low$23.9K/yr expected annual loss, about once every 4 years
• LandslideVery Low$5/yr expected annual loss, about once every 9 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

21 of 3,524 (0.6%)

Homes in high-risk flood zones

0

Flood claims since 1978

11

Claims paid since 1978

$476K

• Drought102
• Hail47
• Flash Flood43
• Thunderstorm Wind16
• Flood11
• Excessive Heat4
• Heat3 · 3 deaths
• Lightning2
• Winter Weather1
• Extreme Cold/Wind Chill1

• Drought11/01/1996

  Dimmit

  $23M damage

  What happened

  Drought persisted through November across the southwestern half of South Central Texas. A heavy snow event near the end of the month again added moisture to soils across the Hill Country. Monthly damages are based on the estimated annual loss to agriculture across all of Texas through this year. Property damages do not include business or commercial revenue losses.

• Flood10/29/1996

  Dimmit

  $20M damage

  What happened

  Rainfall of up to 13 inches on the headwaters of the Nueces River on the evening of the 27th and the morning of the 28th caused the river to rise rapidly. The Nueces finally crested just south of Uvalde at around 20 feet, where flood stage is 11 feet. This was the highest reading since 1962. As it moved southward into Zavala County near 1200CST on the 28th, flow was measured at 200,000 cfs. The river crested near Crystal City at 31 feet. Many homes had to be evacuated, with damage reported to nearly 40 home and mobile homes. The flood wave moved into Dimmit County near 1200CST on the 29th. The river crested near Asherton at just over 29 feet, where flood stage is 20 feet. Damage was reported to around 30 homes and mobile homes along the river. In addition to the damage indictated above, property damage was widespread, with hundreds of livestock drowned and millions of tons of rich topsoil washed away.

• Heat08/30/2000

  Dimmit

  1 death

  What happened

  A non-U.S. resident, the victim was found outside.

• Heat05/12/2000

  Dimmit

  1 death

  What happened

  A non-U.S. resident, the victim was found outside.

• Heat05/19/2000

  Dimmit

  1 death

  What happened

  ABoth were non-U.S. residents and were found outside.

• Flood07/17/2026

  Palm, Dimmit County

  $1.4M damage

  What happened

  A major flood wave on the Nueces River triggered by torrential rain primarily over Uvalde County moved into Dimmit County on July 17 and caused extensive inundation of the floodplain in Dimmit County. Satellite imagery indicated the width of inundation spanned up to 2 miles in width over the lower Nueces River and along Soldier Slough. The Nueces River at Asherton remained at Major flood stage between July 17 and July 24, recording a crest of 31.56ft on July 18.||Damage to public infrastructure in Dimmit County amounted to around $1.4 million with damage primarily wrought to roadway infrastructure, water control facilities, and other utilities. Twenty-eight homes in the county were damaged or destroyed. The greatest amount of inundation in residential areas occurred in the Espantosa Subdivision and areas around Midway Park, where mandatory evacuations were ordered. Several roads in Dimmit County were closed due to flooding including FM65, FM189, FM1019, FM1433, and Highway 85. Flood damage to water wells resulted in a water shortage in Carrizo Springs with water service disruptions continuing into mid-August.

• City of Carrizo SpringsServes 5,830 · Groundwater · Local governmentNo health violations+2 monitoring or reporting
• City of AshertonServes 1,225 · Groundwater · Local government1 health violation+33 monitoring or reporting
• Carrizo Hill WscServes 1,050 · Groundwater · Local governmentNo health violations+11 monitoring or reporting
• City of Big WellsServes 870 · Groundwater · Local governmentNo health violations+1 monitoring or reporting
• Catarina WscServes 222 · Groundwater · Local government1 health violation+33 monitoring or reporting
• Espantosa Water SupplyServes 210 · Groundwater · Local government1 health violation+9 monitoring or reporting
• Brundage Water SystemServes 60 · Groundwater · Local government1 health violation+6 monitoring or reporting