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Heat Exhaustion vs Heat Stroke — at a glance
Heat Exhaustion
Heat Stroke
Skin
Heavy sweating
Hot, dry, no sweat
Mental state
Alert but weak
Confused, agitated, or unconscious
Body temp
Normal to slightly high
103°F+ / 39.4°C+
Action
Rest + hydrate + cool down
Call 911 now
Source: CDC Heat-Related Illness Guidance, 2024. WHO Heat Health Guidance, 2023.
Why Heat Signs
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10 seconds vs 3+ minutes
Time to ruling vs. reading articles
Based on average read time of top 3 Google results for ‘heat exhaustion vs heat stroke’ (measured June 2025)