Right now
The most recent data we hold from IEM arrived 2 hours ago, and this point is in it.
3 other detections within 20 km in the last 24 hours, the nearest 4 km from here.
Reported by IEM today.
It is one of only 4 we have recorded within 20 km of this point since 27 September 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
IEM reported: Kamaoa Road leading to Hwy 11 flood. Flood control channel nearly out of banks. Est. 1.5 of rain last hour.
Nearby, since 27 September 2026
- September 27, 2026 · score 9 · 12.2 km
How we know
One source: IEM. Not yet confirmed by a second, independent source.
Our own score for this event is 9 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 | Floods |
| Severity | High |
| Calamity Score (ours) | 9 / 100 |
| Legacy data-support index | 0.42/1 |
| Coordinates | 19.0400, -155.6300 |
| Nearest City | Hilo (95 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-09-27T03:30:00.000Z |
| Source | https://mesonet.agron.iastate.edu/lsr/ |
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: iem. Occurrence: 2026-09-27T03:30:00.000Z.
First archived: 2026-09-27T03:51:50.268Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
2026-09-27T06:10:24.802Z · data_change
Index 9 → 9; severity high → high; version 5 → 5.
2026-09-27T05:59:44.810Z · data_change
Index 9 → 9; severity high → high; version 5 → 5.
2026-09-27T05:38:16.585Z · data_change
Index 9 → 9; severity high → high; version 5 → 5.
2026-09-27T05:27:39.850Z · data_change
Index 9 → 9; severity high → high; version 5 → 5.
2026-09-27T05:06:32.589Z · data_change
Index 9 → 9; severity high → high; version 5 → 5.
2026-09-27T04:50:34.526Z · data_change
Index 9 → 9; severity high → high; version 5 → 5.
Score Breakdown
Technical Details
| TypeSummary | Flood |
| LsrCode | E |
| LsrType | FLOOD |
| City | 4 SW Naalehu |
| County | Hawaii |
| State | HI |
| Wfo | HFO |
| Remark | Kamaoa Road leading to Hwy 11 flood. Flood control channel nearly out of banks. Est. 1.5 of rain last hour. |
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.
Review the area, threshold and delivery channel in your account.
Want to know when something happens in this area?