At least three people have died as severe thunderstorms batter the Southeast and East Coast on Sunday after deadly tornado-spawning storms tore through Texas and Mississippi, ripping off roofs and flattening homes.

Officials were beginning to assess the damage after a strong storm system moved across the southeastern U.S. over the weekend.

At least two died as a severe weather system continued to move east, threatening to whip up tornadoes in parts of the U.S. Southeast.