Scattered rain showers in San Diego County, particularly in the Otay Mountain Wilderness area, may affect the ongoing response to the Border 2 Fire on Sunday and into Monday.

"Rainfall overnight and into the morning hours has led to a substantial decrease in fire activity," Cal Fire said in an update on Sunday afternoon.

The Red Cross has set up a temporary evacuation shelter at Cuyamaca College, 900 Rancho San Diego Parkway in El Cajon. Christine Welch, regional communications director for the Red Cross, said 31 people and 12 pets stayed at the shelter overnight Friday and 68 people slept in RVs in the parking lot.