AZUSA, Calif.—One person remained missing March 14 after 11 others were rescued from a swollen San Gabriel River in Azusa, authorities said.

Firefighters and rescue personnel from the Los Angeles County Fire Department responded at 6:09 p.m. Monday to North Todd and West Sierra Madre avenues near Encanto Park, where they learned the victims had been swept into the river, according to the fire department.

The victims were rescued via helicopter.

Six dogs were also pulled from the raging river.

With more significant rain falling in Los Angeles County on Tuesday night, officials were warning people to be wary of possible flooding dangers on roads and rivers.