Heat exhaustion can feel like heat stroke, with heavy sweating, dizziness, headache, nausea, weakness, and a fast heartbeat. Dehydration, low blood sugar, a viral illness, or a panic attack can also cause some similar symptoms. You cannot reliably tell the difference from one symptom alone, and heat exhaustion can progress to heat stroke.
Heat stroke is a medical emergency. If you or someone nearby becomes confused, faints, has a seizure, or is unable to respond normally after heat exposure, call 911 immediately. A very high body temperature is another warning sign, but do not delay emergency care to take a reading.
With heat exhaustion, a person is usually alert and able to answer questions, even if they feel extremely tired or nauseated. Their skin may be cool and clammy, and they may sweat heavily. Heat stroke is more likely when overheating is accompanied by changes in thinking or consciousness, such as confusion, unusual behavior, or collapse. Skin may be hot and dry, but a person with heat stroke can also be sweating.
If heat exhaustion is possible, move to a cool place, loosen excess clothing, and cool the skin with wet cloths or a cool shower. Sip water if you are fully awake and able to swallow. Seek medical help if symptoms worsen, vomiting prevents drinking, or you are not improving within an hour.
Dehydration can cause thirst, dizziness, and fatigue, while low blood sugar can bring on sweating, shakiness, and confusion. Fever and some infections can raise body temperature; anxiety or a panic attack can cause sweating, a racing heart, and lightheadedness. Because these conditions can overlap, persistent or severe symptoms deserve medical attention rather than a self-diagnosis.
Yes. A dog may pant heavily and become weak from overheating, but severe signs such as disorientation, collapse, or seizures require immediate veterinary care. Move your dog out of the heat, begin cooling with cool water and airflow, and call an emergency veterinarian while arranging transport. For more warning signs and emergency steps, see our guide to spotting heat stroke in dogs.
Confusion, fainting, seizures, or a very high body temperature after heat exposure can signal heat stroke. Call 911 if you suspect it; you do not need to have every symptom for it to be an emergency.
Leave a comment