Sweltering and "dangerous" heat with indices surpassing 100 degrees Fahrenheit across parts of nine states has prompted the National Weather Service (NWS) to issue warnings for millions of Americans. Newsweek has reached out to NWS for comment via email on Thursday.

Storm Team 3 Weather Aware Days have been issued for Sunday and Monday because conditions will be dangerously hot. It is possible that Savannah ties or breaks the record highs both days. Sunday’s record of 102°F set back in 2010. Monday’s record high is 102°F set back in 1949.

With a stretch of VERY hot weather ahead for the rest of this month into August, it is a good idea to look at how we measure the heat stress on your body.

Dangerous heat will be followed by storms with damaging winds that could hit 65 miles per hour as a frontal system nears the Northeast. Heat-index values (combination of the temperature and humidity) on Friday,

Air temperature, dew point, heat index… all words that are thrown around by the K-X Storm Team during the heat of summer. Meteorologist Michael Gonzalez walks us through why you should care about

The National Weather Service office in Mobile, Alabama, issued a heat advisory in Escambia, Santa Rosa and Okaloosa counties between 10 a.m. and 7 p.m. Monday. Heat index values are forecast to reach as high as 109℉ in portions of south central and southwest Alabama, northwest Florida and southeast Mississippi.

The heat index is expected to be over 100 on July 23, as the Green Bay area is forecast to get temperatures up to 93, according to the National Weather Service Green Bay. With temperatures in the 90s and high humidity, the heat index for July 23 is 106 degrees.