A large eucalyptus tree blocks the northbound lanes of Highway 13 just past Redwood Road in Oakland, Calif., Thursday, Dec. 23, 2021, as heavy rain falls across the region. Heavy overnight rains in Northern California left two people dead in a submerged car as authorities on Thursday urged residents of several Southern California mountain and canyon communities to voluntarily leave their homes because of possible mud and debris flows. (Jessica Christian/San Francisco Chronicle via AP)