This alert expired on 12 August 2026 at 02:45 UTC. It is kept here as a record.
No stronger detection stands among the 26 recorded within 20 km of this point since 16 March 2026 — 8 others scored the same. The last comparable one was on 5 July 2026.
What the source measured
NOAA reported: Flash Flood Warning issued August 11 at 4:49PM EDT until August 11 at 10:45PM EDT by NWS Peachtree City GA
An estimated 1,080,369 people live within 50 km of this point.
Nearby, since 16 March 2026
- March 16, 2026 · score 48 · 7.4 km
- July 5, 2026 · score 52 · 13.7 km
- March 16, 2026 · score 52 · 13.7 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 85 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 52 / 100 |
| Our confidence | 85% |
| Coordinates | 33.4880, -84.7100 |
| Nearest City | South Fulton (12 km) |
| Population Exposed | 1.1M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-11T20:49:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.410d58e11b19162784afe8425060613c2b920fcb.001.1 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Coweta, GA; Fayette, GA; Fulton, GA |
| Headline | Flash Flood Warning issued August 11 at 4:49PM EDT until August 11 at 10:45PM EDT by NWS Peachtree City GA |
| Expires | 2026-08-11T22:45:00-04:00 |
| SenderName | NWS Peachtree City GA |
| HasExactCoords | true |
| Iem TypeSummary | D |
| Iem City | 2 SE Bremen |
| Iem County | Haralson |
| Iem State | GA |
| Iem Wfo | FFC |
| Iem Remark | Broadcast media reports tree down on fence off of Treetop Dr in southeast Bremen. |
| MergedSources | [{"id":"iem_D_33.700_-85.120_1786484100000","source":"iem","severity":"low","severityValue":25,"timestamp":1786484100000,"latitude":33.7,"longitude":-85.12}] |
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 8 March 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.
Want to know when something happens near South Fulton?
Calamity.live data shows a weather event with CalamityScore 52/100, near South Fulton (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.