Runners face challenges such as dehydration, heat exhaustion, and skin damage due to prolonged exposure to high temperatures. Without proper gear, these risks can increase, especially in urban areas like New York where heat can be intensified by concrete and asphalt. The use of sweat-wicking and breathable materials helps reduce overheating, while sunscreen protects against harmful UV rays. Staying hydrated with electrolyte solutions is crucial to prevent heat-related illnesses.