The National Weather Service in Topeka has issued a heat advisory for Douglas County, the third one this week, on Friday.

The advisory will be in effect from noon to 7 p.m. Friday, when the maximum heat index is expected to reach 105 to 109 degrees. The warmest part of the day will be between 2 and 6 p.m.

Shawnee, Jefferson, Franklin and Osage counties are also included in the advisory.

Friday’s low is expected to be around 75 degrees. Saturday will see a high of 97 and a low of 71 degrees.

Earlier this week, heat advisories with similar details were also issued for Monday and Tuesday in Douglas County.

To stay cool in the heat, the weather agency advises Kansans to:

• Reduce, eliminate or reschedule strenuous activities until the coolest time of the day. Children, seniors and anyone with health problems should stay in the coolest available place, not necessarily indoors.

• Wear lightweight, light-colored clothing to reflect heat and sunlight.

• Drink plenty of water, nonalcoholic and decaffeinated fluids. Your body needs water to keep cool. Drink plenty of fluids even if you don’t feel thirsty. People who have epilepsy or heart, kidney or liver disease, are on fluid restrictive diets or have a problem with fluid retention should consult a physician before increasing their consumption of fluids. Do not drink alcoholic beverages and limit caffeinated beverages.

• During excessive heat periods, spend more time in air-conditioned places. Air conditioning in homes and other buildings markedly reduces danger from the heat. If you cannot afford an air conditioner, go to a library, store or other location with air conditioning for part of the day.

• Don’t get too much sun. Sunburn reduces your body’s ability to dissipate heat.

• Never leave children, disabled adults or pets in parked vehicles. Make sure your child’s safety seat and safety belt buckles aren’t too hot before securing your child in a safety restraint system, especially when your car has been parked in the heat. Never leave your child unattended in a vehicle, even with the windows down.