The Houston Health Department recommends the precautions below to avoid heat-related illness such as heat exhaustion or heat stroke.

• Increase water consumption. Drink lots of liquids even before getting thirsty, but avoid beverages with caffeine, alcohol, or large amounts of sugar because these can result in the loss of body fluid.
• Conduct outdoor work or exercise in the early morning or evening when temperatures are not as high.
• Outdoor workers should drink plenty of water or electrolyte replacement beverages and take frequent breaks in the shade or in an air-conditioned facility. 
• People unaccustomed to working or exercising in a hot environment need to start slowly and gradually increase heat exposure over several weeks.
• Wear light-colored, loose-fitting clothing that permits the evaporation of perspiration.
• Do not leave infants, children, senior citizens or pets unattended in a parked vehicle, even if the windows are cracked open. 
• Check to make sure everyone is out of the car and don’t overlook children who may have fallen asleep.
• Wear a wide-brimmed hat to help prevent sunburn as well as heat-related illness. 
• Apply sunscreen, which protects from the sun’s harmful rays and reduces the risk of sunburn.
• Seek accommodations in air-conditioned facilities during the heat of the day if the house is not air-conditioned: a relative’s home, multi-service centers, malls, movie theaters, libraries, etc.
• Take frequent cool baths or showers if your home is not air-conditioned.
• Symptoms of heat exhaustion include weakness, dizziness, excessive sweating, cool or moist skin, nausea or vomiting, muscle cramps, and a fast and weak pulse. 
• People experiencing these symptoms should lower their body temperature by getting to a cooler place, drinking water, taking a cool shower or bath and resting.