20 States Issue Heat Advisory

    FALLS CHURCH, VA - JUNE 30:  Local residents observe damages after a powerful overnight storm in the Washington, DC region June 30, 2012 in Falls Church, Virginia. The storm has left more than a million people in the greater Washington, DC area without power.  (Photo by Alex Wong/Getty Images)

    Alex Wong / Getty Images

    Officials are urging people to seek refuge in shelters as record-breaking temperatures sweep the nation. Twenty states have implemented some level of heat advisory warnings as 100-degree and higher temperatures affect the majority of the country. Four states have already declared states of emergency as huge storms add to the crisis, leaving millions without power and resulting in 13 casualties.

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