A series of powerful storms in the central and southern U.S. over the Memorial Day holiday weekend has killed at least 22 people as they left a wide trail of destroyed homes, businesses and power outages. The destructive storms caused deaths in Texas, Oklahoma, Arkansas and Kentucky and were just north of an oppressive early season heat wave setting records from south Texas to Florida. Forecasters said the severe weather could shift to the East Coat later Monday and warned millions of people outdoors for the holiday to watch the skies.