The sweltering forecast prompted the weather service to issue an excessive heat warning from Tuesday through Thursday. A high of 111 degrees is forecast for Tuesday, followed by a high of 113 on Wednesday, according to the weather service.
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An excessive heat warning was issued for a broad swath of the southwestern U.S. Monday with temperatures expected to approach 120 degrees (almost 49 Celsius) this week in what forecasters say could prove to be the hottest days of the year.
The National Weather Service will decide late Monday whether a three-day excessive heat warning for this week in the Las Vegas Valley will be extended.
The National Weather Service in Las Vegas posted this timelapse video of a thunderstorm on Twitter Monday morning.