This alert is in force until 31 August 2026, 21:15 UTC.
It is the 31st strongest of the 97 detections recorded within 20 km of this point since 12 May 2026. The last comparable one was on 30 August 2026.
What the source measured
NOAA reported: Flash Flood Warning issued August 31 at 11:18AM MST until August 31 at 2:15PM MST by NWS Tucson AZ
An estimated 855,005 people live within 50 km of this point.
Nearby, since 12 May 2026
- July 17, 2026 · score 48 · 9.1 km
- July 25, 2026 · score 41 · 10.0 km
- August 30, 2026 · score 48 · 10.3 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 41 out of 100, at 81 % 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) | 41 / 100 |
| Our confidence | 81% |
| Coordinates | 32.1050, -111.0375 |
| Nearest City | Drexel Heights (4 km) |
| Population Exposed | 855.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-31T18:18:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.8dd65a4a9e9978bf81171eea98580d5fd51e2fee.001.1 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Pima, AZ |
| Headline | Flash Flood Warning issued August 31 at 11:18AM MST until August 31 at 2:15PM MST by NWS Tucson AZ |
| Expires | 2026-08-31T14:15:00-07:00 |
| SenderName | NWS Tucson AZ |
| HasExactCoords | true |
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 41/100, near Drexel Heights (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.