Over 100m Americans urged to stay indoors over extreme heat and humidity

Heatwave expected to settle over states from Gulf coast to Great Lakes and east to Carolinas with 100F temperatures in some cities

More than 100 million Americans are being warned to stay indoors if possible as high temperatures and humidity settle in over states stretching through parts of the Gulf coast to the Great Lakes and east to the Carolinas.

The National Weather Service Prediction Center in College Park, Maryland, said on Monday 107.5 million people will be affected by combination of heat advisories, excessive heat warnings and excessive heat watches through Wednesday.