Heat exhaustion typically lasts between 24 to 48 hours for most people to recover fully, provided they receive proper treatment such as rest, hydration, and cooling down
. Symptoms often start to improve within 30 minutes to an hour after cooling and rehydration, but if they worsen or do not improve within that time frame, medical attention is necessary
. Recovery time can vary depending on the severity of the heat exhaustion, how quickly treatment begins, and individual factors. Some sources note that sensitivity to heat and fatigue may persist for up to a week after the initial episode, requiring avoidance of hot weather and strenuous activity during that period
. In more severe cases, or if heat exhaustion progresses to heat stroke, hospitalization and longer recovery may be required
. In summary:
- Initial symptom improvement: within 30 minutes to 1 hour after cooling and hydration
- Full recovery: generally 24 to 48 hours
- Possible prolonged heat sensitivity and fatigue: up to about a week
- Seek medical care if symptoms worsen, do not improve within an hour, or if signs of heat stroke develop
This timeline assumes prompt and appropriate treatment to prevent complications.
