An extremely dangerous heat wave is underway for the eastern half of the United States as a potent heat dome reaches its peak, bringing the hottest temperatures of the year so far – the hottest in years for some cities – and putting tens of millions at risk.

An intense and nearly historic weather pattern is cooking much of America in a dangerous heat dome this week with triple-digit heat that hasn’t been seen in some places in more than a decade

Heat doesn’t just mean canceled events. It also poses a health risk. If you can’t afford to cool the whole house, make a “cool space” to sleep in.

An expert has tips on how to stay cool during the extreme heat in Pittsburgh. Heat is the leading weather-related cause of death nationwide, surpassing the fatalities caused by floods, tornadoes, hurricanes,

With temperatures set to skyrocket into triple digits Tuesday, here are some ways to cool down in the Boston area. National Weather Service forecasts show the region may reach a dangerous record-setting high of 102 degrees as the heat emergency peaks Tuesday.