California is braced for heavy early morning rain and snow, bringing much needed relief to the parched state, but also the potential for dangerous flash floods and landslides.
National Weather Service officials think it could be the heaviest downpour in Southern California for two years.
The Weather Service said there could be three inches of rain on the coast and up to six inches in the foothills and mountains.
California is certainly in need of a soaking with drought conditions covering 94% of the state, according to the federal website US Drought Monitor.
Outside Los Angeles, officials have ordered residents to evacuate homes in Glendora and Azusa, nestled in foothills ravaged by wildfires in January.
With virtually no vegetation left to impede the flow of water, a "high probability of debris and mudflow," is a very real risk according to local fire department officials.
A flash flood watch has been issued in other parts of Los Angeles County until Sunday.
Forecasters said the fast moving storm could bring thunderstorms, strong winds and even light tornadoes.
A high-surf advisory is in effect over the weekend along the coast, with the potential for beach erosion, coastal property damage and dangerous riptides.
