California (CA) Winter Storm, Road & Freeze Guide
Official winter emergency numbers, live road conditions, warming shelters, and home freeze protection for California (including Los Angeles, San Francisco, Sacramento, Lake Tahoe).
If you only do three things in California
- Emergency & Warming Centers: Call 911 for life-threatening emergencies, or dial 211 (or text your ZIP code to 898-211 for local warming centers) to find open warming shelters.
- Check Roads Before Driving: Check Caltrans QuickMap (or dial 511) for live ice, snowplow, and road closure updates.
- Protect Home Plumbing: Keep indoor heat at 60°F+ during sub-zero cold snaps, disconnect outdoor hoses in September, and know where your main internal water shutoff valve is located.
Official California Winter Links & Numbers
- Life-Safety Emergency: 911
- Warming Shelters & Aid: 211 (or text your ZIP code to 898-211 for local warming centers)
- Official Winter Road Conditions: Caltrans QuickMap (Phone: 511)
- Official Weather Warnings: National Weather Service (CA Active Alerts)
What to expect in California
Rapid temperature plunges, high-altitude blizzards, blowing snow whiteouts, and steep mountain pass closures are common from October through April.
Home & pipe freeze rules for California
Keep indoor heat at 60°F+ during sub-zero cold snaps, disconnect outdoor hoses in September, and know where your main internal water shutoff valve is located.
See our full step-by-step guide: Protecting your home and pipes from freezing →
Driving, black ice, and tire rules in California
Traction and tire chain laws are strictly enforced on mountain passes. Carry chains or 3-Peak Mountain Snowflake (3PMSF) tires and a full sub-zero survival kit in your trunk.
See our emergency car guides: What to do when your car is stuck in snow and recovering from black ice .
Essential situational guides
- Never seen snow before? First-Timer Playbook
- 48-hour winter storm countdown checklist
- Staying warm when the power goes out
- Home & Car winter emergency supply checklist