Flash flooding caused by torrential rains on Saturday turned deadly in northern West Virginia. Officials said up to 4 inches of rain fell within about half an hour.

At least three people were killed and several others remained missing Sunday as flash flooding tore through a West Virginia county. About 2.5 to 4 inches of rain fell in 30 minutes across Ohio County, in the state’s northern panhandle west of Pennsylvania, according to county emergency management director Lou Vargo.

West Virginia Gov. Patrick Morrisey issued a state of emergency in Ohio County on Sunday as the search for those who were reported to be missing continued.