Southern Californians evacuated their homes for the second time this year, but this time, it’s for heavy rain and debris flows that threaten new destruction in areas still recovering from last month’s devastating wildfires.

The National Weather Service warned that rain and flooding would intensify throughout the evening until around 10 p.m., bringing the risk of major flooding, debris flows and damaging winds.

Officials in California distributed sandbags, prepositioned rescue swimmers and told residents to have their go-bags ready as the state prepares for an atmospheric river that could bring heavy rain, winds and flooding Thursday to areas ravaged by wildfires.