What is the sequence of heat injuries, starting with the least severe?

The correct sequence of heat injuries, starting from the least severe, is heat cramps, heat exhaustion, and then heat stroke. This order reflects the progression of heat-related illnesses as the body's temperature regulation fails.

Heat cramps are often the first indication of heat-related stress. They result from the loss of electrolytes due to excessive sweating and can be quite painful, but they are typically not life-threatening.

Heat exhaustion is more serious and manifests with symptoms like heavy sweating, weakness, dizziness, and even fainting. If not addressed, it can lead to more severe conditions, which brings us to the most critical phase: heat stroke.

Heat stroke is a medical emergency and occurs when the body's temperature regulation fails completely, leading to a rapid increase in core body temperature. This condition can cause severe organ damage and can be fatal if not treated promptly.

Understanding this sequence is crucial for anyone involved in outdoor activities or sports, as it emphasizes the importance of early intervention and recognizing the signs of heat-related illnesses before they escalate to a life-threatening stage.