Heat Advisory: what it means
“A Heat Advisory is issued for dangerous heat conditions that are not expected to reach warning criteria. Consider postponing or rescheduling outdoor activities, especially during the heat of the day. If you must be outside, be sure to drink plenty of water and take frequent breaks in the shade. Stay in a cool place, especially during the heat of the day and evening.”
weather.gov →Heat Advisories in effect right now
No Heat Advisories in effect right now.
National Weather Service data, updated Oct 24, 2026, 5:16 AM ET. Not an official warning: follow your local NWS office. All US alerts →
What to do now
- Heat stroke is an emergency. The CDC lists a body temperature of 103°F or higher and says to call 911 right away.
- Heat exhaustion signs include heavy sweating, cold, pale, clammy skin and a fast, weak pulse. Move to a cool place and sip water.
- Do not rely on a fan as your primary cooling device. Above 90°F indoors, the CDC says a fan can increase body temperature.
- Never leave people or pets in a closed car on a warm day. If your home has no air conditioning, find a cooling center.
From our extreme heat safety guide, which links every source.
Watch, warning or advisory?
Each in the National Weather Service's own words.
Heat Advisory
“A Heat Advisory is issued for dangerous heat conditions that are not expected to reach warning criteria. Consider postponing or rescheduling outdoor activities, especially during the heat of the day. If you must be outside, be sure to drink plenty of water and take frequent breaks in the shade. Stay in a cool place, especially during the heat of the day and evening.”
Extreme Heat Warning
“An Extreme Heat Warning is issued when extremely dangerous heat conditions are expected or occurring. Avoid outdoor activities, especially during the heat of the day. If you must be outside, be sure to drink plenty of water and take frequent breaks in the shade. Stay indoors in an air-conditioned space as much as possible, including overnight. Check on family and neighbors.”
Extreme Heat Watch
“An Extreme Heat Watch is issued when conditions are favorable for an extreme heat event but its occurrence and timing is still uncertain. Plan to suspend all major outdoor activities if a warning is issued. If you do not have air conditioning, locate the nearest cooling shelter or discuss staying with nearby family or friends who have air conditioning.”
Get ready before the next one
Also: Emergency preparedness for older adults
Gear: Battery-operated fans
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