Nearly 250 San Juan Capistrano homes were under voluntary evacuation orders after the banks of the Trabuco Creek began eroding, it was reported.
Police received reports around 7:00 a.m. Wednesday that the concrete embankment of the river near Del Obispo Street was being torn away by unusually high runoff, according to the San Juan Capistrano Dispatch. An underground water main was also ruptured.
Around noon, deputies began asking nearby residents and business to leave. An Orange County Fire Authority helicopter broadcast evacuation warnings over loudspeakers and an evacuation center was set up at the city's community center, the Dispatch said.
Capistrano's creek system carries runoff from hundreds of miles to the north and east of the city, according to the Dispatch.
More rains were expected in the area.