The National Weather Service has warned of "searing heat and oppressive humidity that occurs during the 'dog days of summer'.

Risk heat maps are simply mappings of various business elements’ magnitude of risk. Many companies use them as their primary risk-assessment tool, but they don’t paint a complete picture.

Major heat risk was reported in Pennsylvania, Maryland, New York, Vermont, New Hampshire, Maine, Virginia, New Jersey and Massachusetts on Monday, according to the NWS.

"I think it was a lot of grassroots, to be honest, and it worked," Michael Staudenmaier said of rolling out his team's novel heat-risk data tool.

This map shows the latest forecast. A large slice of the American population lives in places that will be subject to heat advisories, warnings and watches from National Weather Service this year.

A heat mapping project in the Reno-Sparks area has revealed how temperatures vary across the Truckee Meadows. Led by the Nevada State Climate Office at the University of Nevada, Reno, and Desert ...

This map shows the projected heat index at 2 p.m. Monday ... heat and humidity wave will put all of Upstate New York in either the “major” or “extreme” risk categories of heat risk.