Floods turned deadly in Northern California as the latest atmospheric river slammed the region over the weekend, dropping nearly a foot of rain in some places. Meanwhile, more heavy rain and flooding are forecast to persist and expand into Southern California through the Christmas holiday week.

Parts of Los Angeles County burned by wildfires earlier this year remained vulnerable to flash flooding, mudslides, and debris flows.

Waves of atmospheric moisture could cause urban flooding and mudslides across California this week, according to the National Weather Service.

A powerful storm carrying a strong atmospheric river is laying siege to California, where evacuations have been issued because of the risk of life-threatening flooding and debris flows. “A dangerous scenario is unfolding,