An Extreme Heat Warning is in effect right now for several Arkansas counties, including Conway, Lonoke, Lee, and North and Central Sebastian. The warning became active on August 18, 2026, at 11:46 AM CDT and runs through August 19, 2026, at 7:00 AM CDT. The warning was issued jointly by the National Weather Service offices in Little Rock, Arkansas; Tulsa, Oklahoma; and Memphis, Tennessee, reflecting the regional scope of the heat event.
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If you are in one of the named counties, this is an active, federally issued warning, not a watch or advisory. Extreme Heat Warnings represent the highest tier of NWS heat-related alerts and are reserved for conditions the agency considers dangerous to human life.
What NWS Is Telling Residents to Do Right Now
The National Weather Service, through its Little Rock office, has issued clear and direct guidance for anyone in the affected areas. These are the agency’s own instructions, not general summer tips:
- Drink plenty of fluids. Do not wait until you feel thirsty. Heat-related illness can develop before thirst signals kick in.
- Stay in an air-conditioned room. If your home does not have working air conditioning, find a location that does, such as a public library, community center, or shopping mall.
- Stay out of the sun. Direct sun exposure intensifies the body’s heat load significantly, especially during the hours when the warning is most active.
- Check up on relatives and neighbors. The NWS specifically calls this out, which means the agency considers social connection a core part of the protective response. Older adults, young children, and people with certain medical conditions face the highest risk. A phone call or a knock on the door can be the difference between a safe outcome and a medical emergency.
These four actions are the official response. Each one is practical and requires no special equipment. The most overlooked item on this list, consistently, is the last one. People tend to assume their neighbors are managing. During an Extreme Heat Warning, that assumption is worth verifying directly.
Why Heat Warnings Matter Beyond the Single Day
Heat is the deadliest weather hazard in the United States by annual average deaths, and it is one of the least visible. Flooding leaves wreckage. Tornadoes leave paths. Heat leaves no visible mark, which is part of why preparedness planning for extreme heat tends to lag behind planning for other disaster types. The same counties under this warning, Conway, Lonoke, Lee, and North and Central Sebastian, may face similar conditions again before summer ends. Using this warning as a prompt to identify the nearest cooling center, confirm that your air conditioning is functional, and build a short check-in list of vulnerable neighbors converts a single-day alert into a durable habit. USRiskRadar covers the full range of weather and disaster risks across the country, and heat preparedness is one of the areas where a small amount of advance planning produces the most immediate protective return. If you are in Arkansas right now and the warning applies to your county, act on the NWS guidance above. If the warning has expired by the time you are reading this, the preparation steps are still worth completing before the next event arrives.
For the fundamentals that apply beyond this specific alert, see our Extreme Heat Preparedness guide.
Source: National Weather Service (NWS Little Rock AR, NWS Tulsa OK, NWS Memphis TN). Active alert data retrieved 2026-08-18 22:00 UTC via api.weather.gov.
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