Heat-related illness kills hundreds each year in the US alone, yet most cases prove preventable with fast action. The difference between heat exhaustion and heatstroke matters urgently.
Heat exhaustion arrives first. Watch for heavy sweating, weakness, dizziness, nausea, headaches, or muscle cramps. Skin turns pale and clammy. Body temperature stays normal or slightly elevated. Move the person to shade or air conditioning immediately. Have them lie down with legs raised. Cool their skin with water, ice packs, or wet cloths. Give them water to drink if they're conscious and alert. Most recover within 30 minutes with these steps.
Heatstroke is the emergency. The body's cooling system fails completely. Sweating stops abruptly. Core temperature spikes above 104 degrees Fahrenheit. The person becomes confused, loses consciousness, or seizes. Skin turns hot and dry or remains wet. Call emergency services right now. While waiting, immerse them in cold water if possible, or douse them with ice water. Remove excess clothing. Do not give fluids if they're unconscious.
Prevention beats treatment. Drink water constantly during heat exposure, not just when thirsty. Avoid peak sun hours between 11 a.m. and 3 p.m. Wear light clothing and sunscreen. Check on elderly neighbors, people on certain medications, and those with obesity or heart conditions, who face higher risk.
Children and pets overheat faster than adults. Never leave anyone in a parked car. Indoor environments without air conditioning reach dangerous temperatures within hours.
THE TAKEAWAY: Recognizing heat exhaustion early and cooling someone quickly prevents progression to life-threatening heatstroke.