Right now
The most recent data we hold from USGS Water Services arrived 22 hours ago, and this point is in it.
One other detection within 20 km in the last 24 hours, 4 km from here.
Reported by USGS Water Services today.
It is one of only 2 we have recorded within 20 km of this point since 18 September 2026. One more was recorded here in the fortnight before it.
What the source measured
USGS Water Services reported: Flood Impact Statement from National Weather Service (OHRFC) NWS ID: DCRI3 "County road 225 north of Pleasant Mills is flooded." | Gage height: 23.24 ft | Ref. point: 17.50 ft
Urban PEI: 24,506 within a heuristic 50 km radius; not unique people.
This is the highest gauge height we have recorded at this point, over 35 readings since 15 August 2026 — the previous range was 7.04 ft to 7.08 ft.
How we know
One source: USGS Water Services. Not yet confirmed by a second, independent source.
Our own score for this event is 56 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
Computed under scoring rules v5. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | River Floods |
| Severity | Critical |
| Calamity Score (ours) | 56 / 100 |
| Legacy data-support index | 0.69/1 |
| Coordinates | 40.7776, -84.8393 |
| Nearest City | New Haven (36 km) |
| Urban exposure index (PEI) | 24.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-18T22:21:03.383Z |
| Source | https://waterdata.usgs.gov/monitoring-location/04181500/ |
Physical priority index · v5. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: nwis. Occurrence: 2026-09-18T22:21:03.383Z.
First archived: 2026-08-15T06:43:40.613Z. Material modification: 2026-09-18T22:25:57.004Z.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
2026-09-18T22:25:57.004Z · data_change
Index 56 → 56; severity critical → critical; version 5 → 5.
2026-09-18T21:53:16.605Z · data_change
Index 56 → 56; severity critical → critical; version 5 → 5.
2026-09-18T21:25:58.331Z · data_change
Index 56 → 56; severity critical → critical; version 5 → 5.
2026-09-18T20:53:04.064Z · data_change
Index 56 → 56; severity critical → critical; version 5 → 5.
2026-09-18T20:20:14.980Z · data_change
Index 56 → 56; severity critical → critical; version 5 → 5.
2026-09-18T19:52:55.435Z · data_change
Index 56 → 56; severity critical → critical; version 5 → 5.
2026-09-18T19:25:34.096Z · model_change
Index 14 → 56; severity low → critical; version 1 → 5.
Score Breakdown
Technical Details
| SiteNo | 04181500 |
| StationName | ST. MARYS RIVER AT DECATUR, IN |
| FloodCategory | major_flooding |
| EstimatedSeverity | major_flooding |
| SeverityProvenance | calamity-rtfi-excess-v1 |
| GageHeight | 7.08 |
| RpElevation | 5.33 |
| Unit | m |
| OriginalGageHeight | 23.24 |
| OriginalRpElevation | 17.5 |
| OriginalUnit | ft |
| SourceImpactThreshold | {"id":16087,"name":"ROAD","value":17.5,"unit":"ft"} |
| RpName | ROAD |
| StateCode | IN |
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.
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