The National Weather Service has issued a heat advisory for Cobb County and much of the rest of north Georgia from 8 a.m. Saturday morning July 1 to midnight Sunday.

What is the heat index?

The NWS defines the heat index as follows on its website:

The heat index, also known as the apparent temperature, is what the temperature feels like to the human body when relative humidity is combined with the air temperature. This has important considerations for the human body’s comfort. When the body gets too hot, it begins to perspire or sweat to cool itself off.

Chart from NOAA showing relationship between relative humidity and temperature in heat index

What is in the heat advisory?

Here is an excerpt from the hazardous weather outlook:

…HEAT ADVISORY IN EFFECT FROM 8 AM SATURDAY TO MIDNIGHT EDT

SUNDAY NIGHT…

* WHAT…Widespread Heat index values from 102 to 110 degrees

  expected.

* WHERE…Portions of central, east central, north central,

  northeast, northwest, southeast and west central Georgia.

* WHEN…From 8 AM Saturday to midnight EDT Sunday night.

* IMPACTS…Hot temperatures and high humidity may cause heat

  illnesses to occur.

* ADDITIONAL DETAILS…Maximum Heat Index values will be highly

  dependent on sporadic thunderstorm development through the

  morning and afternoon hours, which may cool off localized areas

  sooner than expected.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

Drink plenty of fluids, stay in an air-conditioned room, stay out

of the sun, and check up on relatives and neighbors. Young

children and pets should never be left unattended in vehicles

under any circumstances.

Take extra precautions if you work or spend time outside. When

possible reschedule strenuous activities to early morning or

evening. Know the signs and symptoms of heat exhaustion and heat

stroke. Wear lightweight and loose fitting clothing when

possible. To reduce risk during outdoor work, the Occupational

Safety and Health Administration recommends scheduling frequent

rest breaks in shaded or air conditioned environments. Anyone

overcome by heat should be moved to a cool and shaded location.

Heat stroke is an emergency! Call 9 1 1.

What counties are affected in the hazardous weather outlook?

The following counties are listed in the outlook:

Dade, Walker, Catoosa, Whitfield, Murray, Chattooga, Gordon, Floyd, Bartow, Cherokee, Forsyth, Hall, Banks, Jackson, Madison, Polk, Paulding, Cobb, North Fulton, Gwinnett, Barrow, Clarke, Oconee, Oglethorpe, Wilkes, Haralson, Carroll, Douglas, South Fulton, DeKalb, Rockdale, Walton, Newton, Morgan, Greene, Taliaferro, Heard, Coweta, Fayette, Clayton, Spalding, Henry, Butts, Jasper, Putnam, Hancock, Warren, Troup, Meriwether, Pike, Upson, Lamar, Monroe, Jones, Baldwin, Washington, Glascock, Jefferson, Harris, Talbot, Taylor, Crawford, Bibb, Twiggs, Wilkinson, Johnson, Emanuel, Muscogee, Chattahoochee, Marion, Schley, Macon, Peach, Houston, Bleckley, Laurens, Treutlen, Stewart, Webster, Sumter, Dooly, Crisp, Pulaski, Wilcox, Dodge, Telfair, Wheeler, Montgomery, Toombs

Including the cities of Calhoun, Rome, Cartersville, Gainesville,Marietta, Atlanta, Lawrenceville, Athens, Carrollton,Douglasville, East Point, Decatur, Conyers, Covington, Newnan,Peachtree City, Griffin, Milledgeville, Macon, Swainsboro,Columbus, Warner Robins, Dublin, Lumpkin, Americus, Cordele,and Vidalia

About the National Weather Service

The National Weather Service (NWS) is a part of the National Oceanic and Atmospheric Administration (NOAA).

The NWS describes its role as follows:

“The National Weather Service (NWS) provides weather, water, and climate forecasts and warnings for the United States, its territories, adjacent waters and ocean areas, for the protection of life and property and the enhancement of the national economy.

“These services include Forecasts and Observations, Warnings, Impact-based Decision Support Services, and Education in an effort to build a Weather-Ready Nation. The ultimate goal is to have a society that is prepared for and responds to weather, water and climate events.”

Read all the Cobb County Courier climate and weather coverage by following this link.