Death toll rises to 21 as tornadoes, storms buffet US

[Collection]The death toll from tornadoes and other extreme weather that buffeted the central United States over the weekend climbed to 21 on Monday, as the severe storms threatened to roil parts of the East Coast. Storms were still likely to produce damaging wind and hail as they pushed eastward Monday, part of the US Memorial Day holiday weekend, as well as possibly produce "isolated tornadoes" in the eastern Mid-Atlantic, the National Weather Service said.