California is heading into an intensely stormy period, with two powerful systems set to bring destructive rains, winds and the potential for flooding. San Francisco is under a wind warning.

At least one person has died in Redding, California, because of the torrential rain and significant flooding as the state braces for worsening conditions this week. Redding Mayor Mike Littau confirmed the death in a Facebook update Sunday night.

California officials and weather forecasters urged holiday travelers to avoid the roads on Christmas Eve and Christmas Day ahead of a series of powerful winter storms that threatened to slam California with relentless rains, heavy winds and mountain snow through Friday.

After basking in dry, mild weather for several weeks, the tide is turning for California, with an onslaught of rain, snow and wind expected over Christmas week as a series of atmospheric rivers unleash a firehose of moisture on the Golden State.

The San Jacinto Fault, considered part of the San Andreas Fault system, has a 5% chance of magnitude 6.7 or larger earthquakes. The line begins at Cajun Pass and runs southeast through San Bernardino, Riverside County and Imperial County. Meanwhile, the Elsinore Fault, part of the same system, has a 3.8% chance of earthquakes of that size.

As a life-threatening storm heads to California, here's a look at the Christmas week weather forecast: Snow is falling in the Northeast on Tuesday. Up to 1 inch of snow is possible along the Interstate 95 corridor from New York City to Boston,