Which factor is the leading cause of outdoor fatalities?

Hypothermia is the leading cause of outdoor fatalities, primarily because it can occur suddenly and without warning, particularly in cold, wet, and windy conditions. Outdoor enthusiasts may underestimate the risks and fail to adequately prepare for temperature drops, which can lead to significant body heat loss. When a person becomes hypothermic, their mental and physical abilities are compromised, making it difficult to make sound judgments, seek shelter, or get help. Additionally, hypothermia can develop over time, especially during outdoor activities that require prolonged exposure to the elements, even in mild temperatures if clothing becomes wet or if there is excessive wind.

Understanding that hyperthermia can progress quickly underscores the importance of being aware of weather conditions, dressing appropriately in layers, and knowing the signs of hypothermia to prevent these tragic outcomes.