Proper hydration is crucial during a heat wave. Start your day with a glass of water and carry a refillable water bottle with you. Avoid dehydrating beverages like alcohol and coffee, and consider adding electrolytes to your water to replenish essential minerals like sodium and potassium. These minerals help your body absorb hydration and maintain muscle and nerve function. Always plan for water refill stops during outdoor activities and turn back if you're halfway through your water supply.