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What are best practices for preventing heat-related illnesses outdoors?

April 5, 2026

Quick Answer

Prevent heat-related illnesses outdoors by wearing lightweight, light-colored clothing, staying hydrated with at least 8 ounces of water every 15-20 minutes, and taking regular breaks in shaded areas.

Staying Hydrated

Staying hydrated is the most crucial aspect of preventing heat-related illnesses. Aim to drink at least 8 ounces of water every 15-20 minutes, or more frequently if you’re engaging in strenuous activity. Monitor your urine output; if it’s dark yellow or you’re not urinating frequently enough, it’s a sign that you’re not drinking enough water. For every hour of physical activity, drink 16-20 ounces of water to replenish lost fluids. Avoid sugary or caffeinated drinks that can exacerbate dehydration.

Protecting Yourself from the Sun

Protecting your skin from the sun is essential in preventing heat-related illnesses. Wear lightweight, light-colored clothing that covers your skin, including a hat with a wide brim and sunglasses with UV protection. If you don’t have access to sunscreen, stay in shaded areas or seek shade under a tree or umbrella. Avoid spending time outdoors during peak sun hours, usually between 11am and 3pm, when the sun’s rays are strongest.

Managing Heat Exposure

Managing your time outdoors is crucial in preventing heat-related illnesses. Take regular breaks in shaded areas to cool off and rehydrate. Limit your physical activity to short bursts, with 10-15 minute intervals of rest in between. Monitor your body temperature; if you start to feel dizzy, nauseous, or experience headaches, seek shade and rest immediately. If you or someone you’re with experiences severe symptoms, such as seizures or loss of consciousness, call for emergency medical help.

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