From Longman Dictionary of Contemporary Englishheat exhaustionˈheat exˌhaustion noun [uncountable] MIweakness and sickness caused by doing too much work, exercise etc in hot weather
Examples from the Corpus
heat exhaustion• You have to be able to handle real emergencies: sprained ankles, heat exhaustion, sudden snowstorms, canceled flights.• Later in the day, another 1st Platoon Marine was felled by heat exhaustion.• Several elderly men were treated for heat exhaustion.• I was feeling nauseous from heat exhaustion and had sort of passed out.• In its early stages, the symptoms of fatigue and nausea mimic heat exhaustion and can confuse the rangers.• They didn't know that if you have ecstasy you should drink a lot of water because of the risk of heat exhaustion.• These tips also help prevent heat exhaustion, only several cases of which advance to potentially deadly heat stroke at the Canyon.• She slumped down, near to heat exhaustion, and raked her jet hair from her temples. 