Memorial Day Weekend Marred By Severe Weather — And It's Not Over

Powerful storm rips through Valley View, TexasJulio CortezMemorial Day weekend was marred by severe storms across the US.More than 20 people died, and tornado warnings are in effect for Maryland, Texas, and other states.Scientists blame the heat and say the severe weather will continue. Memorial weekend is the unofficial start of summer, and this year it was marred by a series of severe weather incidents that scientists say could continue as temperatures rise.Severe weather, including thunderstorms and tornados, swept across Texas, Oklahoma, Arkansas, and Kentucky over the holiday weekend, destroying buildings and killing over 20 people, according to the Associated Press.