DETROIT – What is the definition of a “heat wave”? You hear it all the time when temperatures are about to rise: “A heat wave is heading toward the area.” National Weather Service offices actually set ...

The nation’s top emergency response agency has long been a lifeline for cities and states struggling with disaster. When hurricanes strike, earthquakes rattle, and tornadoes carve paths of destruction ...

INDIANAPOLIS (WISH) — The National Weather Service in Indianapolis generally defines a heat wave as a period of abnormally hot and humid weather lasting two or more days. However, some East Coast ...

What is a heat advisory? A heat advisory means people sensitive to warm temperatures should take precautions to avoid heat illness, including staying hydrated and seeking breaks if working or playing ...

The heat index measures how hot it really feels outside. The heat index is calculated based on air temperature and relative humidity. The National Weather Service will issue alerts when the heat index ...