Home > Preparedness > Plan For Emergencies > Extreme Heat

Extreme Heat

Each summer, residents and tourists enjoy the warm weather and sunny beaches, but many may be unaware of just how hot it can get in in Jacksonville. Extreme heat is dangerous because it can push your body temperature beyond its limits. If your body can’t cool itself fast enough, permanent damage or even death can occur. When there's a heat risk in Jacksonville, the National Weather Service will issue alerts and warnings. 
Heat Alerts and Warnings
Excessive Heat Outlook
BE AWARE!
The outlooks are issued when the potential exists for an excessive heat event in the next 3-7 days.
Excessive Heat Watch
BE PREPARED!
Heat watches are issued when conditions are favorable for an excessive heat event in the next 24 to 72 hours.
Excessive Heat Advisory
TAKE ACTION!
A Heat Advisory is issued within 12 hours of the onset of extremely dangerous heat conditions, when the maximum heat index temperature is expected to be 100° or higher for at least 2 days, and night time air temperatures will not drop below 75°.
Excessive Heat Warning
TAKE ACTION!
An Excessive Heat Warning is issued within 12 hours of the onset of extremely dangerous heat conditions, when the maximum heat index temperature is expected to be 105° or higher for at least 2 days and night time air temperatures will not drop below 75°.
During Extreme Heat
Stay Cool
  • Stay inside in an air-conditioned area during peak heat hours. 
  • Avoid unnecessary exertion.
  • Wear light, loose fitting clothing.
  • Stay out of the sun and wear a hat. Take breaks often.
  • Check on family, friends, and neighbors.
  • Don't leave your pets outside or in a car.
Stay Hydrated
  • Drink plenty of water, even if you don’t feel thirsty.
  • Avoid alcohol and sugary drinks.
  • Remind others to drink water.
Stay Informed
  • Stay informed about current weather conditions.
  • Know the symptoms of heat illness. 

 
Heat Related Illnesses
Children under 4, adults over 65, and people who are overweight or ill are especially at risk of heat-related illnesses. Here’s how you can recognize heat-related illness and what you should do. 

Heat Exhaustion

Symptoms

  • Heavy sweating
  • Weakness
  • Cold, pale, and clammy skin
  • Weak pulse
  • Fainting and vomiting

 

What You Should Do

  • Move to a cooler location
  • Lie down and loosen your clothing
  • Apply cool, wet cloths to as much of your body as possible
  • Sip water
  • If you have vomited and it continues, seek medical attention immediately

 

Heat Stroke

Symptoms

  • High body temperature (above 103°F)
  • Hot, red, dry, or moist skin
  • Rapid and strong pulse
  • Possible unconsciousness

 

What You Should Do

  • Call 911 immediately — this is a medical emergency
  • Move the person to a cooler environment
  • Reduce the person's body temperature with cool cloths or even a bath
  • Do NOT give fluids