Residents Advised to Stay Indoors, Hydrate, and Monitor Vulnerable Populations as Heat Index Soars to 109 Degrees. HILLSBOROUGH COUNTY, Fla. - Hillsborough County is baking under a heat advisory today,

The National Weather Service issued a Heat Advisory for central and southern Ohio on Saturday due to high heat and humidity.

The National Weather Service forecasts highs between 95 and 100 before temperatures level off. What one doctor recommends for staying safe outdoors

Most of Ohio is under a heat advisory with temperatures that will feel 100-plus. Here's the difference between a heat advisory, heat watch and heat warning.

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.

CENTRAL, Fla. — According to the National Weather Service, Central Florida is under a heat advisory today, and the heat index is expected to reach between 108 and 110 degrees.

Orlando heat wave triggers Heat Advisory with temperatures reaching mid to upper 90's and heat index up to 110°F.

The National Weather Service has issued a severe thunderstorm watch for Connecticut. The entire state is under the severe thunderstorm watch, according to the National Weather Service. The watch is in effect until 9 p.m., according to the National Weather Service.

From Texas to New England, millions of Americans are facing dangerously hot temperatures that have led the National Weather Service to issue heat advisories and extreme heat warnings this week.