Heat Exhaustion or Heat Stroke? Warning Signs Every Active Person Should Know
On a hot training day, skin discomfort is not the only thing worth noticing. Heat illness can progress quickly. Knowing when to stop and how to get help matters for athletes, coaches and outdoor workers alike.
Watch for the whole picture
The CDC / NIOSH lists headache, nausea, dizziness, weakness, thirst and heavy sweating among possible heat-exhaustion symptoms. Heat stroke may involve confusion, slurred speech, loss of consciousness or seizures. A person with heat stroke may have hot dry skin or be sweating heavily; sweating does not rule it out.
| Question | Evidence or practical step |
|---|---|
| Weak, dizzy or nauseated in the heat | Stop activity, move to a cooler place and seek medical evaluation; have someone stay with the person. |
| Alert and able to swallow | Cool the person and offer frequent sips of cool water while arranging care. |
| Confusion, collapse or seizure | Call 911; move to shade and cool rapidly with cold water or an ice bath if feasible, or wet skin and fan while awaiting help. |
| Unconscious or unable to swallow | Do not give anything by mouth; follow the emergency dispatcher's directions. |
Plan before the session
Check the forecast and local heat guidance, allow time to adjust to heat, plan breaks and watch teammates. CDC guidance for athletes recommends stopping activity and getting to a cool place if you feel faint or weak. A moisturizer does not prevent heat illness and should never delay emergency care.
For separate skin-care topics, read about heat rash and eczema and sunburn after outdoor sports. For routine dry-skin care on another occasion, see Dr. Arsy Moisturizer #003.
Sources and further reading
- CDC / NIOSH: Heat-related illnesses and first aid.
- CDC: Heat and athletes.
- CDC Yellow Book: Heat and cold illness in travelers.
Educational information from Dr. Arsy, not individual medical advice. Cited organizations and researchers do not endorse this product.