Table of Contents
- Why San Francisco Clogged Drains 2025 Hit So Hard
- The 5 Neighborhoods That Flooded Worst This Week
- What Actually Clogs SF Storm Drains (It’s Not Just Leaves)
- How to Report Flooded Drains SF 311 – The Right Way
- Immediate Fixes You Can Do This Weekend
- Permanent Homeowner Solutions (Cost vs Payoff)
- Your 2025 SF Drainage Action Checklist
- Key Takeaways & Free Download
Why San Francisco Clogged Drains 2025 Hit So Hard
Between November 13–15, 2025, San Francisco’s 100+ year-old combined sewer system was completely overwhelmed. The atmospheric river dropped 0.75–1.5 inches in hours, but the real culprit was decades of neglected catch basins and street gutters packed with leaves, trash, and construction silt. Entire blocks in the Haight, Mission, and Sunset turned into lakes because water had nowhere to go.
For single-family homeowners, this meant water shooting out of street drains and straight into garages, basements, and side yards. One Noe Valley client had 14 inches in their finished basement — all because the catch basin 20 feet away was 100% clogged.
