Tropical Storm Hilary drenched Southern California from the coast to inland mountains and deserts on Sunday evening, prompting rescues from swollen rivers and forcing some of the nation’s largest school districts to cancel Monday classes. Millions braced for more flooding and mudslides, even as the storm began to weaken.

The first tropical storm to hit Southern California in 84 years, Hilary brought intensifying rain to the region, with some mountain and desert areas seeing more than half an average year’s worth of rain come down in just one day, including the desert resort city of Palm Springs, which saw nearly 3 inches of rain by Sunday evening.