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Young woman holding water bottle

Overview

Causes

Everyone is at risk of heat exhaustion if they are in a hot environment, especially if they are not replacing the fluid and salt lost in sweat. These groups have a greater risk:

Signs and Symptoms

The warning signs of heat exhaustion may include:

Heat Syncope: Fainting From Heat

Treatment

If you recognize that you are having the early symptoms of heat exhaustion, use these self-care tips immediately:

If You Are Assisting Someone

Use these strategies to help someone in trouble:

When to See the Doctor

If your symptoms or that of the person you are assisting get worse or last longer than an hour, get medical help at an urgent care clinic or emergency room.

Signs of a Medical Emergency

Heat Rash: How It Looks and What to Do

3 SourcesVerywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read oureditorial processto learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.State of California Department of Industrial Relations.What is heat illness?Centers for Disease Control and Prevention.Frequently asked questions (FAQ) about extreme heat.Cleveland Clinic.Heat illness.

3 Sources

Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read oureditorial processto learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.State of California Department of Industrial Relations.What is heat illness?Centers for Disease Control and Prevention.Frequently asked questions (FAQ) about extreme heat.Cleveland Clinic.Heat illness.

Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read oureditorial processto learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.

State of California Department of Industrial Relations.What is heat illness?Centers for Disease Control and Prevention.Frequently asked questions (FAQ) about extreme heat.Cleveland Clinic.Heat illness.

State of California Department of Industrial Relations.What is heat illness?

Centers for Disease Control and Prevention.Frequently asked questions (FAQ) about extreme heat.

Cleveland Clinic.Heat illness.

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