A giant redwood that crashed through a retaining wall during Sunday's stormy weather is blocking Valley Avenue.
Police have shut down Valley in the eastbound direction between Northway and Crestline while crews saw through the massive branches and feed them through a woodchipper.
The tree, growing in the back yard of a home on the corner of Crestline and Valley, fell directly across two lanes of traffic.
It's unknown when the road will be reopened.
The National Weather Service has issued a wind advisory for Alameda County. Wind gusts of up to 40 mph have been reported in the Bay Area.