Police said the scene "looked like a World War One battlefield"

(Reuters)

(Twitter/Eliason Mike)

At least 13 people are dead amid "waist-deep" mudslides in Southern California, where heavy rains triggered flooding, say officials.

Some 163 people have been taken to hospital. Twenty had "storm-related injuries" and four were critically hurt.

A group of up to 300 people are reportedly trapped in Romero Canyon, east of Santa Barbara.

Police said the scene "looked like a World War One battlefield"

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