Heat-related illnesses are progressive, ranging from mild symptoms to life-threatening conditions.
- Heat cramps are the earliest sign of heat illness. These are hard, tense and painful muscle cramps of the hands, calves, feet, thighs or arms.
- Heat exhaustion can occur as a result of a rising internal temperature and dehydration. Signs of heat exhaustion include nausea, dizziness, muscle cramps, presyncope, headache, fatigue and heavy sweating.
- Heat stroke is a life-threatening medical emergency with a fatality rate of up to 71%. Therefore, it requires immediate medical attention and intervention.
Sources:
Maricopa County Dept of Public Health – 2023 Heat Related Deaths Report
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