What are the stages of heat-related illness in order from least to most severe?

The correct sequence of heat-related illnesses, from least to most severe, is cramps, exhaustion, and heat stroke.

Heat cramps are typically the mildest form of heat-related illness and can occur during strenuous exercise in hot weather. They are characterized by painful, involuntary muscle contractions that happen when the body loses too much salt and water through sweating. This stage serves as an early warning sign of heat-related illness.

Following cramps, heat exhaustion represents a more serious progression. It is characterized by symptoms such as heavy sweating, weakness, dizziness, nausea, and headache. The body is unable to cool itself effectively, and if not addressed, it can escalate to even more severe conditions.

Heat stroke is the most severe form of heat-related illness and occurs when the body's temperature regulation fails, leading to a dangerously high body temperature. This condition can result in confusion, loss of consciousness, and can be fatal if not treated quickly. Understanding the correct order of these conditions is crucial for effective prevention and intervention when monitoring individuals at risk for heat-related illnesses.