Roundup: Tornadoes, storms cause injuries, damage in 15 U.S. states

HOUSTON, April 1 (Xinhua) -- An unusually massive outbreak of thunderstorms, including devastating tornadoes, on Friday struck at least 15 U.S. states in the South and the Midwest, causing multiple injuries, severe damage and widespread outages.

From northern Illinois and southern Wisconsin, including Chicago and Milwaukee, tornadoes watches extend nearly 1,000 miles (1,600 km) all the way to Mississippi and Tex