Weather alert survival
Excessive Heat Warning:
your action plan.
When the National Weather Service issues an Excessive Heat Warning, the heat is no longer just uncomfortable — it is dangerous. This guide translates the alert into a simple, hour-by-hour plan you can follow at home, at work, or on the move.
Quick definition
An Excessive Heat Warning means dangerously hot conditions are expected within the next 12–24 hours, usually when the heat index is forecast to reach 105°F or higher for at least two hours. It is more urgent than a Watch or Advisory.
Part 1
What to do before the warning hits
Preparation is the single biggest factor in staying safe. Most heat emergencies happen because people waited until they already felt bad to act. Run through this checklist the evening before or the morning of the warning.
- ✓Charge your phone and any small USB-powered fans.
- ✓Freeze water bottles and damp washcloths overnight.
- ✓Close blinds and curtains before sunrise traps heat indoors.
- ✓Identify the coolest room in your home and plan to spend peak hours there.
- ✓Check on neighbors, older relatives, and anyone without air conditioning.
- ✓Download a local weather app with push alerts for your county.
Part 2
What to do during the warning
Treat the warning like a weather emergency. The goal is to keep your core temperature down, stay hydrated, and limit time outdoors when the sun is highest.
- ✓Stay indoors between 10 a.m. and 8 p.m. if possible.
- ✓Drink water before you feel thirsty — aim for a glass every hour.
- ✓Avoid alcohol, caffeine, and heavy meals that raise body temperature.
- ✓Wear loose, light-colored clothing and a wide-brim hat if you must go out.
- ✓Take cool (not ice-cold) showers or place a damp cloth on your neck and wrists.
- ✓Never leave children or pets in a parked car, even for a minute.
Cooling rituals
Small rituals that drop your body temperature fast
These are low-tech, anywhere cooling techniques. Pair them with shade, water, and rest, and they can keep you comfortable when air conditioning is not an option.
The 3-Second Neck Cool
Dampen a small cloth or bandana and press it against the back of your neck. The carotid arteries there carry blood close to the surface, so cooling this spot drops your whole-body temperature fast.
Phone-Powered Pocket Fan
Plug a mini fan into your phone for instant airflow in a line, a parking lot, or a crowded outdoor event. No batteries to charge, no extra device to carry.
Frozen Bottle Rotation
Keep two frozen water bottles in the freezer. Take one with you; by the time it melts, you have cold water to drink and a cold surface to hold against your wrists.
The Floor-Down Rest
Heat rises. Sit or lie on the lowest level of your home, near a tile or concrete floor. Place a fan at ankle level to move cooler air across the ground toward you.
Know the signs
Heat exhaustion vs. heat stroke
Heat exhaustion
- Heavy sweating and cool skin
- Dizziness, nausea, or muscle cramps
- Tiredness or weakness
- Pulse that is fast but weak
What to do: Move to a cool place, loosen clothing, sip water, and apply cool, wet cloths. Call a doctor if symptoms last more than an hour.
Heat stroke
- Body temperature of 103°F or higher
- Hot, red, dry, or damp skin
- Confusion, slurred speech, or fainting
- Pulse that is fast and strong
What to do: Call 911 immediately. Move the person to a cool place, lower their temperature with cool cloths or a bath, and do not give them anything to drink.
Common questions
Excessive Heat Warning FAQ
What is an Excessive Heat Warning?
An Excessive Heat Warning is issued by the National Weather Service when heat index values are forecast to reach or exceed 105°F for at least two consecutive hours, generally within the next 12 to 24 hours. It means the heat is dangerous, not just uncomfortable.
How is a warning different from a watch or advisory?
An Excessive Heat Watch means dangerous heat is possible within the next 24 to 72 hours. A Warning means it is expected soon. An Heat Advisory means conditions are less severe but still risky for sensitive groups.
Who is most at risk during an Excessive Heat Warning?
Adults over 65, young children, pregnant people, outdoor workers, athletes, people with heart or lung conditions, and anyone without reliable air conditioning. Pets are also vulnerable.
What temperature triggers an Excessive Heat Warning?
The trigger varies by region. In the Northeast, warnings may start at 95°F. In the Southwest, they may not start until 110°F or higher. The key factor is the heat index, which combines temperature and humidity.
What should I do if I don't have air conditioning?
Close windows and blinds during the day, open them at night if outdoor air cools down, use fans to create cross-ventilation, take cool showers, visit a public cooling center, and check your local health department for free cooling locations.
Stay cool, everywhere you go.
A pocket-sized fan that plugs into your phone — no batteries, no charging, just cool air when the warning is in effect.
Related: Heat safety guide