A massive area of the United States is either under a heat advisory or excessive heat warning. The advisories include much of Tennessee west of Putnam, Overton, White and Pickett counties. Clinton County, Kentucky is under an excessive heat warning while Wayne County, Kentucky is under a heat advisory. This is expected to last until Sunday. The heat index in these areas could reach as high as 108 degrees.

Here are some safety tips provided by the American Heart Association:

Time It Right

Get outside during the coolest parts of the day, like the morning or evening

Avoid outdoor activity from 12-4 PM, the hottest part of the day

Give yourself time to warm up and cool down before each activity

Stay Hydrated

Drink water before, during and after activities, even if you don’t feel thirsty

Fuel up with hydrating fruits and veggies, smoothies and infused water

Carry a water bottle or hydration pack with you for easy hydration

Dress for Comfort

Wear lightweight, light-colored clothes

Lace up with breathable shoes, lightweight socks and supportive insoles

Protect yourself with sunglasses, waterproof sunscreen and a hat or visor

If you do have to get outside in extreme temperatures, it is important to know the symptoms of heat exhaustion and heat stroke:

Symptoms of heat exhaustion:

Headaches

Cool, moist skin

Dizziness and light-headed

Weakness

Nausea and vomiting

If you experience these symptoms, move to a cooler place, stop exercising and cool down immediately by using cool wet cloths, compresses, and fanning. You need to seek medical attention.

Symptoms of heat stroke:

The symptoms of heat stroke include

Fever (temperature above 104 F)

Irrational behavior

Extreme confusion

Dry, hot, and red skin

Rapid, shallow breathing

Rapid, weak pulse

Seizures

Unconsciousness

If you experience these symptoms or observe someone else with these symptoms, call 911 or the local emergency number right away.

Conditions are expected to improve starting next week.