NWS flood alerts span large portions of California on Friday after an atmospheric river system hit the area over Christmas.

For the first time in about a quarter of a century, not a single square mile of California remains dry, according to the ...

Heavy snow and strong winds accompanied an atmospheric river over parts of California. These maps show snow totals.

A California Geological Survey map released earlier this year depicts just how intense and damaging the shaking from future earthquakes will be across the state, revealing where the threat is most ...