Heat Stroke can cause a death.

Heat stroke is a medical emergency that occurs when your body is unable to cool itself down. It's the most serious form of heat-related illness and can be fatal if not treated promptly. Here's a breakdown of heat stroke:
Causes
Heat stroke happens when your body overheats due to prolonged exposure to high temperatures, strenuous activity in hot weather, or a combination of both. When this occurs, your body's sweating mechanism fails, preventing it from regulating its temperature.
Symptoms
The primary symptom of heat stroke is a body temperature of 104°F (40°C) or higher. Other signs include:
 * Altered mental state (confusion, disorientation)
 * Flushed, hot, and dry skin
 * Throbbing headache
 * Nausea and vomiting
 * Dizziness
 * Rapid, shallow breathing
 * Seizures
 * Loss of consciousness

Risk factors
Certain factors can increase your risk of heat stroke, such as:
 * Infants and young children
 * Older adults
 * People with chronic medical conditions
 * Individuals taking certain medications
 * People who are overweight or obese
 * Engaging in strenuous activity in hot weather

Treatment
Heat stroke is a medical emergency. If you suspect someone is suffering from heat stroke, call emergency services immediately. While waiting for help, take steps to lower the person's body temperature:
 * Move them to a cool, shaded area.
 * Remove excess clothing.
 * Apply cool water (not ice) to their skin or clothing.
 * Fan them with cool air.

Prevention
Here are some tips to prevent heat stroke:
 * Stay hydrated by drinking plenty of fluids, even if you don't feel thirsty.
 * Avoid strenuous activity during the hottest part of the day.
 * Wear loose, lightweight, and light-colored clothing.
 * Take cool showers or baths periodically.
 * Avoid sugary drinks and alcohol.
 * Be aware of the weather forecast and heat advisories.