Search and rescue personnel scan a home in the aftermath of a mudslide Saturday, Jan. 13, 2018, in Montecito, Calif. Most of the people of Montecito, a town usually known for its serenity and luxury, were under orders to stay out of town as gas and power were expected to be shut off Saturday for repairs. (Marcio Jose Sanchez)

The death toll from Southern California's devastating mudslides has reached 20 after another body was discovered, authorities said Sunday. No information about the victim's identity was provided.

Four people remain missing after last week's flash floods in coastal Montecito, said Santa Barbara County spokesman Justin Cooper, according to the Associated Press.

Search-and-rescue missions are continuing, although large amounts of mud and debris have made searches difficult. Several areas in Santa Barbara County remain under mandatory evacuation orders, with most of Montecito still shut off from natural gas service.

The mudslides destroyed 65 homes and damaged 462 others, fire officials said. Many commercial properties were damaged, as well. Twenty-eight people were injured.