California Water Alerts — 5 Active Issues
Data source: NWS, EPA SDWIS
5 active water-related issues in California. Last updated: 2026-08-11.
Weather & Safety Alerts (5)
Active alerts from the National Weather Service that may affect water safety:
Fire Weather Watch — Severe
Areas: Surprise Valley California; Western Lassen, Eastern Plumas, and Eastern Sierra Counties; Greater Lake Tahoe and Truckee Area; Eastern Lassen County; Northern Washoe County
Fire Weather Watch issued August 11 at 10:19AM PDT until August 13 at 9:00PM PDT by NWS Reno NV
Expires: August 12, 2026
Fire Weather Watch — Severe
Areas: Sierra Nevada of Tehama-Butte-Plumas Counties Above 3000 ft; Sierra Nevada of Yuba-Sierra-Nevada-Placer Counties Between 3000-5000 ft Including Interstate 80; Sierra Nevada of Sierra-Nevada-Placer ...
Fire Weather Watch issued August 11 at 9:57AM PDT until August 13 at 9:00PM PDT by NWS Sacramento CA
Expires: August 13, 2026
Flood Watch — Severe
Areas: Mono; Mineral and Southern Lyon Counties
Flood Watch issued August 11 at 9:34AM PDT until August 13 at 9:00PM PDT by NWS Reno NV
Expires: August 13, 2026
Coastal Flood Advisory — Minor
Areas: San Francisco; North Bay Interior Valleys; San Francisco Bay Shoreline; Northern Monterey Bay; Southern Monterey Bay and Big Sur Coast
Coastal Flood Advisory issued August 10 at 10:18PM PDT until August 13 at 2:00AM PDT by NWS San Francisco CA
Expires: August 12, 2026
Air Quality Alert — Info
Areas: Imperial County Southwest; Chuckwalla Mountains; Imperial County Southeast; Imperial County West; Imperial Valley; Palo Verde Valley
Air Quality Alert issued August 11 at 10:19AM MST by NWS Phoenix AZ
Expires: August 12, 2026
High-Risk Areas (Forecast)
ZIP codes in California with the highest probability of future violations:
| ZIP | City | 2-Year Probability | Trend |
|---|---|---|---|
| 90045 | Los Angeles | 95% | stable |
| 90048 | Los Angeles | 95% | stable |
| 90067 | Los Angeles | 95% | stable |
| 90606 | Whittier | 95% | declining |
| 90640 | Montebello | 95% | declining |
| 90660 | Pico Rivera | 95% | declining |
| 90670 | Santa Fe Springs | 95% | stable |
| 90755 | Signal Hill | 95% | declining |
| 90802 | Long Beach | 95% | increasing |
| 90803 | Long Beach | 95% | increasing |
Sources
- Weather alerts: National Weather Service
- Violations & enforcement: EPA SDWIS
- Compliance forecasts: ZipCheckup analysis
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