Fair-skinned people are more susceptible to sunburn and sunstroke due to having less dark pigment in their skin. Excessive heat can cause the body's heat-regulating systems to stop working properly. Prolonged sun exposure without protection can lead to sunburn, eye irritation from the sun's rays and allergies from pollen and dust, as well as dehydration from excessive water loss. Drinking plenty of water and energy drinks, wearing sunglasses and sunscreen, and staying hydrated can help you stay safe and healthy in hot, sunny weather.