This alert expired on 24 July 2026 at 09:00 UTC. It is kept here as a record.
No stronger detection stands among the 16 recorded within 20 km of this point since 1 May 2026 — 12 others scored the same. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued July 23 at 10:55PM CDT until July 24 at 4:00AM CDT by NWS Houston/Galveston TX
An estimated 3,670,695 people live within 50 km of this point.
Nearby, since 1 May 2026
- May 23, 2026 · score 52 · 7.3 km
- May 24, 2026 · score 52 · 11.3 km
- May 23, 2026 · score 52 · 11.3 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 52 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) | 52 / 100 |
| Our confidence | 81% |
| Coordinates | 29.7351, -95.5745 |
| Nearest City | Alief (4 km) |
| Population Exposed | 3.7M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-24T04:09:00.000Z |
Score Breakdown
Technical Details
| Event | Flood Warning |
| Urgency | Expected |
| Certainty | Likely |
| AreaDesc | Harris, TX; Brazoria, TX; Fort Bend, TX; Harris, TX |
| Headline | Flood Warning issued July 23 at 10:55PM CDT until July 24 at 4:00AM CDT by NWS Houston/Galveston TX |
| Expires | 2026-07-24T04:00:00-05:00 |
| SenderName | NWS Houston/Galveston TX |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.6c48d14a69e582750a99a1e97a4201835737b285.001.1","noaa_urn:oid:2.49.0.1.840.0.2efd51cd96ab12269453ea6c6c08b68bd79d65fd.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 52/100, near Alief (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.