This alert expired on 12 August 2026 at 00:15 UTC. It is kept here as a record.
Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued August 11 at 2:13PM PDT until August 11 at 5:15PM PDT by NWS San Diego CA
An estimated 343,793 people live within 50 km of this point.
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 out of 100, at 80 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 43 / 100 |
| Our confidence | 80% |
| Coordinates | 33.4024, -116.3999 |
| Nearest City | La Quinta (30 km) |
| Population Exposed | 343.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-11T21:13:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.9dbe47a1c35c2fb1c0c6de626f1c1d44 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | San Diego, CA; Riverside, CA; San Diego, CA |
| Headline | Flash Flood Warning issued August 11 at 2:13PM PDT until August 11 at 5:15PM PDT by NWS San Diego CA |
| Expires | 2026-08-11T17:15:00-07:00 |
| SenderName | NWS San Diego CA |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.9dbe47a1c35c2fb1c0c6de626f1c1d44485dea06.001.1","noaa_urn:oid:2.49.0.1.840.0.40423cc4e11892db4447adb0d59c68b54494b86b.001.1"] |
Safety Information
During flooding: never walk, swim, or drive through floodwaters. Six inches of moving water can knock you down, and one foot of water can sweep away a vehicle. Move to higher ground if waters rise. After flooding, avoid contact with floodwater which may contain sewage, chemicals, or debris. Follow local emergency service guidance.
Series begins 10 February 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Calamity.live data shows a weather event with CalamityScore 43/100, near La Quinta (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.