Heat Dome Explained: How to Stay Safe During Extreme Heat
EXTREME WEATHER — Hot weather can become dangerous when high temperatures last for several days. One term often used during major heat events is “heat dome.”
But what does a heat dome actually mean, and what should people do when extreme heat is expected?
What Is a Heat Dome?
A heat dome is a weather pattern linked to a strong area of high pressure that can remain over a region for an extended period.
As air sinks and warms, very hot conditions can develop and remain in place for several days. A heat wave refers to the unusually hot weather people experience at the surface.
However, a heat dome does not mean every location will have the same temperature or danger level. Local weather conditions can be very different from one area to another.
Check Your Local Weather Warning
People should be careful when seeing dramatic heat warnings on social media.
A post may mention a heat event, certain dates or several states, but that does not necessarily mean the warning applies to your area today.
The National Weather Service uses different levels of heat alerts. An Extreme Heat Watch means dangerous heat may develop, while an Extreme Heat Warning means extremely dangerous heat is expected or already happening. A Heat Advisory also means people should take steps to protect themselves.
Always check the latest forecast and warning for your exact location.
How to Stay Safe in Extreme Heat
Simple actions can reduce the risk from very hot weather:
- Drink water and stay hydrated.
- Avoid heavy physical activity during the hottest part of the day.
- Move outdoor activities to cooler hours when possible.
- Wear light, comfortable clothing.
- Spend time in an air-conditioned or cooler place.
- Take regular breaks during outdoor work or exercise.
- Check on older people, children and anyone who may need extra help.
- Never leave a child alone inside a parked vehicle, even for a short time.
People who have been told by a medical professional to limit fluids should ask their healthcare provider about how to manage drinking during extreme heat.
Make a Heat Safety Plan
It is better to prepare before the temperature becomes dangerous.
Check the local forecast before leaving home. If you have outdoor work, exercise, travel or other plans, consider moving them to a cooler time of day.
Families can also decide in advance who will check the weather, who may need help and where everyone can go to cool down if necessary.
Don’t Rely on Old Social Media Posts
Heat warnings can spread quickly online, but old posts and screenshots may no longer describe current conditions.
Before sharing a warning, check three important things:
Where does it apply?
When does it apply?
What should people do?
The safest approach is to use the latest information from your local weather authority.
Stay Informed, Stay Safe
Extreme heat should always be taken seriously, but people should also avoid panic caused by outdated or misleading information.
Check the current local forecast, prepare ahead of time and take sensible steps to stay cool when temperatures rise.
Click to read the full guide and learn how to prepare for extreme heat before it becomes dangerous.
