High Humidity and Heat Increase Risk of Heat-Related Illness

As temperatures rise this week, high humidity levels can make conditions feel much hotter than the actual air temperature. Humidity slows the body’s ability to cool itself through sweating, increasing the risk of heat-related illnesses.

Understanding the warning signs of heat exhaustion and heat stroke can help prevent a serious medical emergency.

Heat Exhaustion

Heat exhaustion occurs when the body loses too much water and salt through sweating.

Common symptoms include:

• Heavy sweating
• Cool, pale, or clammy skin
• Weakness or fatigue
• Dizziness or fainting
• Headache
• Nausea or vomiting
• Muscle cramps

If someone is experiencing heat exhaustion:

• Move them to a cool location.
• Encourage them to drink water or a sports drink.
• Loosen clothing.
• Apply cool, wet cloths to the skin.

Seek medical attention if symptoms worsen or do not improve.

Heat Stroke

Heat stroke is the most serious heat-related illness and requires immediate medical attention.

Symptoms may include:

• Body temperature of 103°F (39.4°C) or higher
• Hot, red, dry, or damp skin
• Confusion or altered mental status
• Slurred speech
• Seizures
• Loss of consciousness

If you suspect heat stroke:

• Call 911 immediately.
• Move the person to a cooler area.
• Use cool cloths, ice packs, or cool water to help lower body temperature.
• Do not give the person anything to drink if they are unconscious or confused.

Heat Safety Tips

To reduce your risk of heat-related illness:

• Drink water regularly, even if you do not feel thirsty.
• Avoid strenuous outdoor activities during the hottest part of the day.
• Wear lightweight, loose-fitting clothing.
• Take frequent breaks in air-conditioned spaces.
• Never leave children or pets in a parked vehicle.
• Check on older adults, young children, and individuals with chronic health conditions.

Learn More

For additional information about heat safety and preventing heat-related illness, visit:

• Heat.gov: https://www.heat.gov

• CDC Extreme Heat Resources: https://www.cdc.gov/extreme-heat

• National Weather Service Heat Safety: https://www.weather.gov/safety/heat