Moderate Storm Surge — San Francisco, CA
Water level 0.58m above predicted at San Francisco, CA. Observed: 1.23m, Predicted: 0.64m (MLLW datum).
Geographic Context
This flood event occurred near Chinatown (approximately 5 km away) in United States, where river systems, coastal storm surge, and flash flooding each present distinct hazard profiles. An estimated 4.0M people live within 50 km of the event location, placing this in the "significant" population impact tier.
Event Assessment
This event is a flooding event detected through hydrological monitoring stations and satellite observations. Calamity.live has classified it as "medium" severity with a severity value of 48.73. The computed Calamity Score is 46 out of 100, reflecting a moderate-impact event. The primary scoring components are: population (100), historical (80), intensity (20). Data for this event was sourced from co_ops, one of the 250 scientific monitoring sources aggregated by Calamity.live.
Regional Monitoring Context
United States has a documented history of flood events. Monitoring for flood events in the region relies on a combination of ground-based sensors, satellite remote sensing, and official reporting from national agencies. The frequency and severity of such events are tracked over time to support risk assessment and emergency preparedness.
Event Data
| Type | Flood |
| Severity | medium |
| Severity Value | 48.73 |
| Calamity Score | 46 / 100 |
| Confidence | 85% |
| Coordinates | 37.8063, -122.4659 |
| Nearest City | Chinatown (5 km) |
| Population Exposed | 4.0M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-10T01:18:00.000Z |
| Source | https://tidesandcurrents.noaa.gov/stationhome.html?id=9414290 |
Score Breakdown
Technical Details
| StationId | 9414290 |
| StationName | San Francisco, CA |
| ObservedM | 1.226 |
| PredictedM | 0.644 |
| SurgeM | 0.582 |
| Datum | MLLW |
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.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Calamity.live data shows a flood event with CalamityScore 46/100, near Chinatown (United States), based on data from co_ops. Source: Calamity.live, a platform aggregating real-time data from 197 scientific monitoring sources.