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California Winter 2026-27 Weather Awareness: Fix Cars Before Snow
Sacramento, CA – Five common vehicle problems could leave California drivers stranded when snow, ice and freezing temperatures affect mountain highways this winter. From Sacramento, San Francisco and
By Nora Whitfield · 2026-10-30T08:29:49.243Z
Sacramento, CA – Five common vehicle problems could leave California drivers stranded when snow, ice and freezing temperatures affect mountain highways this winter. From Sacramento, San Francisco and San Jose to Los Angeles, San Diego, Fresno, Bakersfield, Truckee, South Lake Tahoe, Redding and Mammoth Lakes, motorists should prepare before traveling through winter weather.
According to the National Highway Traffic Safety Administration NHTSA , winter vehicle preparation includes checking tires, batteries, windshield wipers, lights and essential fluids. Caltrans also urges drivers to monitor road conditions and comply with chain controls during winter storms.
5 Car Problems to Fix Before Snow 1. Worn tires or low pressure
Insufficient tread reduces traction on snowy or icy roads. Check tire pressure against the manufacturer's recommendation. Drivers heading into the mountains should understand California's tire chain and traction requirements.
2. Brakes that need attention
Snow and ice increase stopping distances, especially on steep mountain grades. Have worn or poorly performing brakes inspected. All wheel drive does not eliminate the risk of sliding while braking.
3. Damaged windshield wipers
Replace streaking wipers, use washer fluid rated for freezing temperatures and carry an ice scraper and snow brush. Heavy snow, slush and road spray can quickly reduce visibility.
4. A weak battery
Cold temperatures reduce battery performance and can expose an aging battery's weaknesses. Have the battery and charging system tested before winter, and consider carrying a portable jump starter.
5. Heating, lighting or fluid problems
Check the heater, windshield defroster, headlights, brake lights and engine coolant protection. Reliable heating and visibility are particularly important during mountain travel.
California Highways Face Different Winter Hazards Winter conditions can affect Interstate 80, Interstate 5, U.S. Highway 50, U.S. Highway 395, State Route 88 and State Route 18.
Across the Sierra Nevada, heavy snowfall can disrupt travel near Donner Pass, Echo Summit and Lake Tahoe.
Northern California's mountain regions, including Shasta, Siskiyou, Plumas and Lassen counties, can experience snow covered roads and freezing temperatures.
Southern California drivers may encounter winter conditions in the San Bernardino and San Gabriel mountains, including routes toward Big Bear Lake and Mountain High.
California drivers must follow posted chain controls. Depending on the restriction level, chains or approved traction devices may be required. Even drivers of four wheel drive vehicles may need to carry chains in chain control areas.
What California Drivers Should Keep in Their Cars Pack blankets, warm clothing, water, nonperishable food, a flashlight, phone charger, shovel and reflective warning devices. Carry properly sized chains when required and practice installing them before traveling.
Before departure, check forecasts, Caltrans QuickMap and highway closures. Avoid unnecessary mountain travel during severe winter storms.
If stranded in dangerous weather, remaining with the vehicle may be safer than walking for help. Keep the exhaust pipe clear before running the engine to reduce carbon monoxide risks.
For official guidance, visit the NWS Sacramento office , NWS Reno office , NWS Hanford office , Caltrans QuickMap , Caltrans chain controls information and NHTSA winter driving safety resources .