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UPDATE: Heat advisory until 7 p.m.; dangerous mix of high temps, humidity

Kelsey Bradshaw
Austin American-Statesman

Noon update: A heat advisory for Travis, Williamson, Hays and Comal counties is now in effect until 7 p.m., the National Weather Service said.

During the advisory, you should be more careful outside. Forecasters suggest the following ways to stay safe:

• Drink plenty of fluids.

• Stay in an air-conditioned room and out of the sun.

• Take frequent breaks from the sun if you have to be outside.

• Move strenuous outdoor activities to the evening when temperatures are cooler.

• Watch for signs of heat-related illness, including dizziness, nausea or headaches.

• Wear loose-fitting and light clothing.

• Check on neighbors and family and never leave children or pets unattended in a vehicle.

Temperatures at Camp Mabry just after noon were at 91 degrees, according to the weather service.

Tuesday forecast for Austin: It had to happen eventually, y’all! Austin’s main weather station at Camp Mabry is expected to record its first triple-digit temperature of the year on Tuesday, with a heat advisory to boot.

Skies will be mostly sunny during the day with a high near 100 degrees and a heat index as high as 104, the National Weather Service said. Temperatures could break Austin’s heat record for this date, when it hit 101 in 2008.

South winds blowing 5 to 10 mph will become west-northwest in the afternoon. Winds could have gusts as high as 20 mph.

A heat advisory for Travis, Williamson, Hays and Comal counties will be in effect from noon to 7 p.m., the weather service said. A heat advisory is issued when the heat index value is expected to reach between 100 and 104 and heat-related illness is more likely to occur.

A heat index combines relative humidity with air temperature to more accurately determine how hot your body will feel outside. Increased humidity makes it harder for sweat to evaporate, which is how the body cools down.

During the advisory, forecasters suggest drinking plenty of fluids, staying in an air-conditioned room and keeping out of the sun.

If you can, reschedule strenuous outdoor activities to the early morning or evening when it’s cooler outside. Take frequent breaks while outside and wear lightweight and loose-fitting clothing.

Watch for signs of heat stroke or heat exhaustion, which include dizziness, nausea or headaches.

Be sure to check up on neighbors and family and never leave children or pets unattended in vehicles, forecasters said.

Skies will be mostly clear at night as temperatures cool off to a low around 68 degrees.

A 20% chance of rain after 4 p.m. will decrease to 10% before 7 p.m., forecasters said.

West-northwest winds blowing 5 to 10 mph will become north-northeast after midnight. Winds could have gusts as high as 20 mph.

Temperatures will return to the 90s on Wednesday, according to the weather service’s extended forecast:

Wednesday: Sunny with a high near 93. North-northeast winds blowing 5 to 15 mph will have gusts as high as 25 mph. Clear at night with a low around 65.

Thursday: Sunny with a high near 94. Mostly clear at night with a low around 66.

Friday: Sunny with a high near 94. Mostly clear at night with a low around 68.

Saturday: Sunny with a high near 96. Clear at night with a low around 70.

Sunday: Sunny with a high near 96. Mostly clear at night with a low around 71.

Monday: Sunny with a high near 96.

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