PREPARE FOR SEVERE WEATHER
Prepare now to reduce damage, flooding, & polluted runoff.
The County of San Diego encourages construction site operators to prepare now for the upcoming rainy season.
The National Oceanic and Atmospheric Administration (NOAA) forecasts a greater than 90% chance of a very strong El Niño during fall and winter 2026–27.
While this does not guarantee above-average rainfall or larger storms in our region, early preparation can help protect people, property, and local waterways during major storm events.
Risks to People, Property, & Waterways
- Unstable slopes & moving soil
- Flooding & blocked access from debris flows
- Downed trees & utility hazards
- Turbid & contaminated runoff
- Sediment & debris entering storm drains
- Failed & overwhelmed Best Management Practices (BMPs). BMPs are measures used to prevent pollutants and sediment from entering storm drains and local waterways.
How to Reduce Risk
- Install and maintain Erosion & Sediment Control BMPs – reinforce & replace as needed
- Divert runoff away from work areas
- Protect disturbed areas, slopes, stockpiles, & drainages
- Have backup BMPs & emergency controls ready
- Document site conditions & improvements
- Prioritize high risk areas & adjust operations as needed
Learn More. Get Prepared.
For severe weather preparedness information and construction site resources, visit or scan the QR code below.
Additional resources: El Niño Preparedness | County of San Diego Office of Emergency Services
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ONLINE SERVICES
Report Stormwater Pollution
Report observed pollution to the correct jurisdiction.
Citizen Access Portal
Research property information and permits. Apply for some permits online.
GIS Maps
Find property information including zoning designation with our web-based mapping tool.
Watershed Protection Website
sandiegocounty.gov/stormwater
Learn more about available water quality rebates that you could apply to your property!
Project Clean Water efforts are focused on providing a centralized point of access to water quality information and resources for San Diego County Watersheds. Click HERE to visit Project Clean Water’s website.
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