A heat advisory has been extended for all of North Texas, including the Dallas-Fort Worth Metroplex, as temperatures reach dangerous levels this week.
The advisory is in effect from noon Wednesday until 8 p.m. Saturday and includes the following counties: Anderson, Collin, Cooke, Dallas, Delta, Denton, Ellis, Erath, Fannin, Freestone, Grayson, Hamilton, Henderson, Hill, Hood, Hopkins, Hunt, Jack, Johnson, Kaufman, Lamar, Montague, Navarro, Palo Pinto, Parker, Rains, Red River, Rockwall, Somervell, Tarrant, Van Zandt and Wise.
High temperatures are expected to reach the middle and upper 90s, with the heat index approaching values around 105 degrees due to a high amount of humidity in the air.
While those who work outside are warned to be cautious, there some some jobs, even in this heat, where coats are comfortable.
"About 40 degrees year-round in here," said NYTEX Zamboni driver Max Tosh. "So no matter how hot it is outside, it's nice and cool in here."
At the Reddy Ice vault in Fort Worth, the temperature is kept at 19 degrees.
"I used to have to keep a coat on all the time," delivery driver Michael Harris explained. "Over time, you get used to it."
Heat exhaustion or heat stroke can quickly develop when the heat index is that high, the National Weather Service warns. Avoid serious illness by drinking plenty of water, wearing light and loose-fitting clothing when possible and avoiding strenuous outdoor activities during the afternoon.