The hazardous weather conditions warrant what the National Weather Service (NWS) classifies as an “extreme heat warning,” which is in effect across much of the Upper Peninsula until 10 p.m. EDT (9 p.m. CDT).

On Monday, at 7:48 p.m. EDT, the temperature at Marquette Sawyer Regional Airport was 97 degrees Fahrenheit. Today may be even hotter; the forecast for Escanaba showed a high of 103 degrees.

The heat index could be as high as 105 to 110, NWS warns.

After low temperatures in the 70s overnight, residents received little relief and are faced with continuing heat.

The magenta color that fills most of the U.P. indicates an "extreme heat warning," while the orange in Rhinelander and the E.U.P. signifies a "heat advisory." These conditions were in effect at 9 p.m. last night. The extreme heat will continue until tonight. (National Weather Service)

The NWS issues the following precautionary and preparedness guidance:

– Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

– Do not leave young children and pets in unattended vehicles. Car interiors may reach lethal temperatures in a matter of minutes.

– Take extra precautions when outside. Wear lightweight and loose-fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and

heat stroke.

Temperatures will drop slightly later in the week. As of 9 p.m. last night, Escanaba was forecasted to see a high of 91 on Wednesday and a high of 87 on Thursday, with a chance of rain Thursday night and Friday.