This alert expired on 18 July 2026 at 14:15 UTC. It is kept here as a record.
It is the 4th strongest of the 149 detections recorded within 20 km of this point since 12 March 2026. The last comparable one was on 9 July 2026. 18 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued July 18 at 6:09AM EDT until July 18 at 10:15AM EDT by NWS Mount Holly NJ
An estimated 1,905,019 people live within 50 km of this point.
Nearby, since 12 March 2026
- June 10, 2026 · score 46 · 1.6 km
- March 12, 2026 · score 52 · 3.4 km
- July 6, 2026 · score 52 · 8.3 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 | 39.2131, -76.2081 |
| Nearest City | Middle River (24 km) |
| Population Exposed | 1.9M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-18T10:09:00.000Z |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Kent, MD; Queen Anne's, MD |
| Headline | Flash Flood Warning issued July 18 at 6:09AM EDT until July 18 at 10:15AM EDT by NWS Mount Holly NJ |
| Expires | 2026-07-18T10:15:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| 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 52/100, near Middle River (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.