Strong storms with damaging winds and hail pummeled north Texas on Tuesday morning as much of the U.S. recovered from severe weather, including tornadoes, that killed at least 23 people during the Memorial Day holiday weekend.

Widespread power outages were reported in the region, which includes Dallas and Fort Worth, where an oppressive, early-season heat wave added to the misery. Nearly 800,000 customers lacked electricity Tuesday, including close to 390,000 in Dallas County, according to PowerOutage.us.

Destructive storms over the weekend caused deaths in Texas, Oklahoma, Arkansas, Missouri and Kentucky.

Seven people were killed in Cooke County, Texas, from a tornado that tore through a mobile home park Saturday, officials said, and eight deaths were reported across Arkansas.

Two people died in Mayes County, Oklahoma, east of Tulsa, authorities said. The injured included guests at an outdoor wedding. A Missouri man died Sunday after a tree limb fell onto his tent as he was camping.