A broken levee shut down U.S. Highway 101 in Northern California on Wednesday and forced about 30 students and teachers to spend the night in their school’s gym.

Meanwhile, a nursing home in a neighboring county evacuated its residents because of flooding.

The levee near the school in Chualar was partially breached about 2 p.m., KSBW reported. The rain came as an atmospheric river storm drenched the state.