What to Do During an Extreme Heat Warning
When the National Weather Service issues an extreme heat warning, it is telling you the heat is dangerous, not just unpleasant. These warnings go out when temperatures, or the heat index that folds in humidity, are expected to climb high enough to threaten people's health, sometimes for several days running. It is the kind of weather that sends people to the emergency room and, in a bad stretch, costs lives. The reassuring part is that the dangers are largely preventable once you know the steps. Here is a clear, practical answer to the question of what to do during an extreme heat warning so you and the people around you stay safe.
What an Extreme Heat Warning Actually Means
Weather alerts come in tiers, and it helps to know where a warning sits. A heat advisory or a heat watch is a heads-up that dangerous heat is possible or on the way. An extreme heat warning (sometimes called an excessive heat warning) is the most serious level, issued when severe, potentially deadly heat is happening or about to. In short, a warning means take action now, not later.
The danger climbs higher when the heat does not let up at night. Your body relies on cooler evenings to recover, and during a true heat event those cooler nights may not come, so the strain stacks up day after day. That is why officials take multi-day warnings so seriously, and why your plan should cover the nights as much as the afternoons.
Stay Out of the Heat During Peak Hours
The single most effective move is also the simplest: get out of the heat, especially during the hottest part of the day, roughly late morning through early evening. If you can stay indoors somewhere cool during those hours, do it. Save errands, yard work, and exercise for early morning or after sunset when the temperature backs off.
If you have to be outside, take it easy. Move slower than usual, rest often in the shade, and give your body time to adjust instead of pushing through. Wear loose, light-colored, breathable clothing, a wide-brimmed hat, and sunscreen, since a sunburn makes it harder for your body to shed heat. Never leave a child, an older adult, or a pet in a parked car, not even for a couple of minutes and not even with the windows cracked, because the inside of a car can reach deadly temperatures within minutes on a hot day.
Drink Water Before You Feel Thirsty
Heat pulls fluid out of you through sweat faster than you might notice, and thirst lags behind what your body actually needs. During an extreme heat warning, drink water steadily through the day rather than waiting until you feel parched. Keep a bottle close and sip often, even when you are resting indoors.
If you are sweating heavily for hours, plain water is not quite enough, because sweat carries out salt and minerals along with the water. Add an electrolyte drink or tablet, or pair your water with a salty snack, to keep your balance steady. Go light on alcohol and heavy caffeine during the worst heat, since both work against you by drawing out fluid. If your doctor limits your fluid intake for a medical reason, ask them what to do during extreme heat before you change anything.
Keep Your Home as Cool as You Can
Air conditioning is the best protection during extreme heat, so if you have it, use it, and set it to keep your space genuinely cool during the peak. If you do not have AC at home, plan to spend the hottest hours somewhere that does: a library, a mall, a community center, or an official cooling center your city opens during heat emergencies. A few hours in real cool air does a lot to reset your body.
Block the heat before it gets in. Close blinds and curtains on the sunny side of the house in the morning and keep them shut through the afternoon, since sunlight through glass heats a room like a space heater. Keep windows closed while it is hotter outside than in, and open them for a cross-breeze only once the evening air actually drops below your indoor temperature. Hold off on the oven and other heat-makers, and run fans to move air over your skin.
Cool Your Body When the Room Stays Hot
When you cannot get a room cool enough, cool your body directly instead. A cool shower or bath pulls heat from your skin quickly. A cool, damp cloth on the neck, wrists, or forehead helps, since large blood vessels run close to the surface in those spots and cooling there registers fast. A fan aimed at you helps sweat do its job.
Some people like to keep wearable cooling on hand for the stretches when they are stuck in the heat. A cooling neck ring is a soft loop of TPU filled with phase-change gel that rests around your neck for hands-free relief. It needs no batteries, makes no noise, and does not drip, and it recharges with nothing but cold: about 20 minutes in the freezer, roughly 10 minutes in cold tap water, or a stretch under an AC vent. The gel resets anytime it meets something below 64°F, and a charge lasts around one to two hours depending on conditions. It is worth being honest about what it is. A cooling neck ring is a comfort accessory, not a medical device. It will not lower your core body temperature and it does not replace AC, shade, water, and rest, which are your real protection during an extreme heat warning. Think of it as a helpful nudge toward comfort, not a safeguard against heat illness.
Watch for Heat Illness and the Emergency Signs
During an extreme heat warning, know the warning signs your body sends and act on them early. Heat exhaustion is the first stage: heavy sweating, cool or clammy skin, headache, dizziness, nausea, weakness, muscle cramps, and a fast, weak pulse. If you or someone nearby feels that way, move to a cooler place, rest, sip water, loosen clothing, and cool the skin. Most people turn the corner within an hour.
Heat stroke is a life-threatening emergency. The signs include a very high body temperature, confusion or slurred speech, flushed skin that may be dry or still damp, a pounding pulse, and fainting. Call 911 right away, move the person somewhere cooler, and cool them aggressively with cold water and cold packs on the neck, armpits, and groin while help is on the way. Do not give fluids to anyone who is confused or not fully alert. The shift from heat exhaustion to heat stroke can happen fast, so when someone's mental state changes, treat it as the emergency it is.
Check On the People Most at Risk
Extreme heat hits some people much harder than others. Older adults, young children, people with chronic illnesses, outdoor workers, and anyone without AC face the highest risk, and so do pets. If you take a medication, ask your pharmacist or doctor whether it affects how your body handles heat, since some do. Make a point of checking on elderly relatives and neighbors at least once a day during a warning, in person or by phone, because a quick check can genuinely save a life.
An extreme heat warning is the weather service telling you to take the heat seriously, and the response is straightforward: stay out of the peak heat, drink water before you are thirsty, keep your space cool or get to a cool place, cool your body directly when you need to, and watch closely for heat illness. Treat heat stroke as a 911 emergency every time, and look out for the people least able to handle the heat. Take those steps and you can ride out even a dangerous stretch of weather safely.
This article is general safety information, not medical advice. If a health condition or medication affects how you tolerate heat, talk with your doctor about a hot-weather plan. In a suspected heat stroke or any medical emergency, call 911 or your local emergency number.