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Record Heat to Bake the Central US as Storm Threat Intensifies

  • Ohio Valley could be swept by dangerous thunderstorms Monday
  • Record high tempertaures will make overnights hot, muggy
A woman shields herself from the sun, in Calexico, California on June 12.

A woman shields herself from the sun, in Calexico, California on June 12.

Photographer: , Sandy Huffaker/Getty Images

Record heat will sear the central US Monday, and there is a potential for fast-moving thunderstorms to sweep down from the Great Lakes and across the Ohio Valley later as well.

Temperatures could reach 101 degrees Fahrenheit (38 degrees Celsius) in St. Louis Monday and only drop to 79 overnight as extreme heat spreads out across the Mississippi Valley and into the Midwest, said Bob Oravec, a senior branch forecaster with the US Weather Prediction Center. The high temperatures by day and the warm lows overnight will boost electricity demand.