Forecasters say expected 'worst Christmas storm' is elevating flood risk for a large swath of southwest California.

More than 41 million Americans across California, Nevada and Arizona are under flood watches on Wednesday amid a rare, high ...

A serious multi-day flood threat is underway in the Southwest as two former tropical systems turn the typically dry desert into a breeding ground for heavy rain. Soaking rainfall began over the region ...

A major storm is lashing California with powerful winds and is set to deliver months’ worth of rain that could trigger debris flows and flash floods.

As the year draws to a close, we take a look at some of the biggest natural disasters of the year and the large-scale devastation they caused.