Flood Risk in San Antonio, TX
Risk Level: Extreme — Score 9/10
Live Flood alert status near San Antonio
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Live flood map around San Antonio
Shows flood 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 Very High risk for this hazard
- Estimated annual loss of $365M from this hazard type
- Extensive history of significant events in this area
- High recent activity — multiple events in the 12 months to Aug 9, 2026
- Average annual frequency: 7.5 events per year
Peak season: March-September
Last significant event: Flood - San Antonio area, Texas, United States (2026-07-11) — 1,330,000 people exposed
Highest Risk Cities for Floods
How San Antonio Compares
Notable Flood Events Near San Antonio
DisasterAWARE's historical archive records 5 notable flood events near San Antonio, ranked below by impact. The most impactful: Flood - San Antonio area, Texas, United States (May 2026) — 2,020,000 people exposed; $241,457M capital exposed.
Flood - San Antonio area, Texas, United States
May 11, 2026 — ADVISORY
2,020,000 people exposed; $241,457M capital exposed
Flood - San Antonio area, Texas, United States
May 22, 2026 — ADVISORY
1,660,000 people exposed; $210,908M capital exposed
Flood - San Antonio, TX Region, United States
May 30, 2025 — WARNING
1,670,000 people exposed; $207,046M capital exposed
Flood - San Antonio area, Texas, United States
June 8, 2026 — ADVISORY
1,500,000 people exposed; $192,637M capital exposed
Flood - San Antonio area, Texas, United States
July 11, 2026 — ADVISORY
1,330,000 people exposed; $168,784M capital exposed
Flood Preparedness Tips
- 1.Know if your property is in a flood zone — check FEMA maps
- 2.Consider flood insurance even if not in a high-risk zone
- 3.Never drive through flooded roadways — Turn Around, Don’t Drown
- 4.Move valuables and important documents to upper floors
- 5.Install sump pumps and check valves in plumbing
Related Pages
How this data is built
San Antonio, TX flood risk combines Historical Event Intelligence with authoritative hazard modeling from the Geospatial Intelligence Layers catalog. Live flood 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 Flood Risk in Real Time
Get real-time flood alerts for San Antonio, TX and hundreds of other locations with DisasterAWARE's enterprise platform.