Extreme Heat Risk in San Antonio, TX
Risk Level: Very High — Score 7/10
Live Extreme Heat alert status near San Antonio
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Live extreme heat map around San Antonio
Shows extreme heat warnings and events that are active right now, refreshed through the day. When none are active, the map is empty by design.
Key Risk Factors
- FEMA rates San Antonio's county as Relatively High risk
- Estimated annual loss of $39M from this hazard type
- 13 events recorded in proximity in recent decades
- 1 event(s) in the 12 months to Aug 9, 2026
- Average annual frequency: 10.3 events per year
Peak season: June-September
Last significant event: Excessive Heat - Deep South Texas, United States (2026-06-18) — 5,050,000 people exposed
Highest Risk Cities for Extreme Heats
How San Antonio Compares
Notable Extreme Heat Events Near San Antonio
DisasterAWARE's historical archive records 5 notable extreme heat events near San Antonio, ranked below by impact. The most impactful: Excessive Heat - Deep South Texas, United States (June 2026) — 5,050,000 people exposed; $530,188M capital exposed.
Excessive Heat - Deep South Texas, United States
June 18, 2026 — WARNING
5,050,000 people exposed; $530,188M capital exposed
Extreme Heat - Southwest Texas, United States
May 13, 2025 — WARNING
749,000 people exposed; $96,292M capital exposed
Extreme Heat - Central Texas, United States
August 13, 2020 — WARNING
Impact data not available
Extreme Heat - Texas and Oklahoma, United States
August 6, 2019 — WARNING
Impact data not available
Extreme Heat - Southern and Central Texas, United States
June 19, 2019 — WARNING
Impact data not available
Extreme Heat Preparedness Tips
- 1.Stay hydrated — drink water regularly even if you don’t feel thirsty
- 2.Avoid outdoor activities during peak heat hours (10 AM – 4 PM)
- 3.Know the signs of heat exhaustion and heat stroke
- 4.Check on elderly neighbors and those without air conditioning
- 5.Never leave children or pets in a parked vehicle
Related Pages
How this data is built
San Antonio, TX extreme heat risk combines Historical Event Intelligence with authoritative hazard modeling from the Geospatial Intelligence Layers catalog. Live extreme heat monitoring is available through the Event Intelligence API and the DisasterAWARE Platform.
The data behind this page
Every score and event here comes from DisasterAWARE's hazard database — available as downloadable historical datasets and a real-time API.
Monitor Extreme Heat Risk in Real Time
Get real-time extreme heat alerts for San Antonio, TX and hundreds of other locations with DisasterAWARE's enterprise platform.