A fierce storm, dubbed "bombogenesis" or "weather bomb", has eased in southern California, while pressing on further north in the US state, according to BBC.

Torrential rain, flash floods and mud slides wreaked havoc on Friday and early Saturday, killing at least five people.

Metrologists said it was the worst storm to hit California in years.

Forecasters warned residents in the north, including San Francisco, to expect more heavy rain on Sunday.