Tornadoes and severe thunderstorms ripped through parts of Texas, Oklahoma and Arkansas late Saturday evening and Sunday morning, leaving at least 15 people dead and causing widespread damage.

Around midday Sunday, some rescue crews in those states were still searching for missing people and digging out from the rubble, while residents in other states such as Kentucky and Tennessee were facing severe weather from the eastward-moving storms.

More than 400,000 residents throughout the region had lost power as of Sunday afternoon, according to the website poweroutage.us.

At least 15 are dead after tornadoes rip through parts of Texas, Oklahoma, Arkansas