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But not all heat illnesses are the same. While heat exhaustion can often be managed with rest and hydration, heatstroke is a medical emergency that requires immediate care. Here’s how to tell the difference, what to do in the moment, and when to head to the Emergency Room.

What Is Heat Exhaustion?

Heat exhaustion happens when your body overheats and can’t cool itself effectively. This is often due to intense activity in hot, humid weather. Signs of heat exhaustion include:

• Heavy sweating

• Weakness or fatigue

• Dizziness or lightheadedness

• Nausea or vomiting

• Headache

• Cool, clammy skin

What to Do for Heat Exhaustion

• Move to a shaded or air-conditioned space

• Remove excess clothing

• Drink water or an electrolyte beverage

• Apply cool, wet cloths to the skin or take a cool shower

• Rest and monitor symptoms closely If symptoms do not improve within 30 minutes or worsen, it may be progressing to heatstroke.

What Is Heatstroke?

Heatstroke is the most severe form of heat illness and it’s a medical emergency. In heatstroke, the body’s core temperature rises above 104°F and the ability to sweat may shut down.

Signs of heatstroke include:

• High body temperature (104°F or higher)

• Red, hot, dry or damp skin

• Confusion, agitation, or disorientation

• Slurred speech or seizures

• Loss of consciousness

When to Go to the ER

If someone shows signs of heatstroke, call 911 or head to the nearest ER immediately. While waiting for help: - Move the person to a cooler place - Remove excess clothing - Use cool cloths or a fan to lower body temperature - Do NOT give fluids if the person is unconscious or confused At Ally Medical Emergency Room, we provide rapid IV fluids and emergency support to stabilize and treat heatstroke.

The Bottom Line

Heat-related illnesses can escalate quickly in young children, older adults, athletes, and outdoor workers.

Know the signs. Act fast. And don’t hesitate to seek emergency care when symptoms go beyond basic heat exhaustion. We’re open 24/7 to provide fast, expert care with little to no wait.

Need Emergency Care Now?

Find your nearest Ally Medical ER 

Questions? Call us! We're here to help.

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