Fall leaves are being blamed for blocking drains, causing water to build up on roadways
One of the worst accidents was a frightening sight inside the middle bore of the Caldecott Tunnel where a pair of collisions caused one car to burst into flames.
No one was seriously hurt, but the smoke-filled tunnel was shut down for about one hour and thirty minutes.
At least two other accidents hampered Highway 24 near the Caldecott Tunnel.
In Oakland a big rig lost control and jack-knifed on northbound I-880 near Broadway. The Highway Patrol closed three lanes while crews cleaned up 75 gallons of spilled diesel fuel. The truck driver suffered minor injuries.
In Walnut Creek a collision at the intersection of Bonanza and Locust around 10 o'clock Saturday morning, sent a car through the front door of Hubcaps Diner. No injuries were reported despite flying glass.
In the North Bay, 50-mile-per-hour wind gusts knocked down an old oak tree in the City of Windsor in Sonoma County forcing the temporary closure of Wallace Road at Foothill Ranch.
