PRECAUTIONS CAN PREVENT HEAT-RELATED ILLNESSES
The Houston Department of Health and Human Services (HDHHS) recommends residents begin taking precautions against high temperatures to avoid heat-related illnesses. High body temperatures can lead to damage to the brain or other vital organs and even death.
HDHHS recommends that the elderly, a population
especially vulnerable to high temperatures, ask relatives, friends
or neighbors to visit them regularly during the approaching
hot months and check on them for signs of heat exhaustion or
heat stroke. It takes the aged nearly twice the time of younger
people to return to core body temperature after exposure to
Others who are particularly vulnerable include
infants and children up to four years of age, those who are
overweight and people with heart and respiratory problems.
Heat exhaustion, usually associated with heavy
activity, is the body’s response to an excessive loss of water
and salt contained in sweat. Signs include profuse sweating,
paleness, muscle cramps, weakness, dizziness, headache, nausea
or vomiting, a weak-but-rapid pulse and fainting. The skin may
be cool and moist. If heat exhaustion is untreated, it may progress
to heat stroke.
Heat stroke occurs when the body’s temperature
rises rapidly, the sweating system fails and the body is unable
to cool down. Body temperature may rise to 106°F or higher within
10 to 15 minutes. Heat stroke can cause death or permanent disability
if emergency treatment is not given.
Heat stroke symptoms include an extremely high
body temperature (above 103°F, orally), red, hot and dry skin
(no sweating), rapid and strong pulse, throbbing headache, dizziness,
nausea, confusion and unconsciousness.
Staying indoors, preferably in an air-conditioned
home or building such as a library, shopping mall or multi-service
center, is the best protection against the heat. Electric fans
may provide comfort, but when the temperature is in the high
90s, fans without refrigerated air only spur the movement of
hot humid air, which will accelerate body heating and raise
internal body temperature. Taking a cool shower or bath or moving
to an air-conditioned place is a much better way to cool off.
To avoid heat-related illness:
- Increase water consumption. Drink lots of liquids even before getting thirsty, but avoid those with caffeine, alcohol or large amounts of sugar because these can actually result in the loss of body fluid.
- Conduct outdoor work or exercise in the early morning or evening when it is cooler. Outdoor workers should drink plenty of water or electrolyte-replacement beverages and take frequent breaks in the shade or in an air-conditioned facility. Those 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 children, senior citizens or pets unattended in a vehicle.
- A wide-brimmed hat helps prevent sunburn as well as heat-related illness. Sunscreen also protects from the sun’s harmful rays and reduces the risk of sunburn.
- If the house is not air-conditioned, seek accommodations in air-conditioned facilities during the heat of the day: malls, movie theaters, libraries, multi-service centers, etc.
- Take frequent cool baths or showers if your house is not air-conditioned.
Stay alert to heat advisories. The National Weather Service declares a Heat Emergency when the heat index, a computation of the air temperature and humidity, reaches 108 degrees on two or more consecutive days. A heat index of 108 is a potential health threat for all people and is particularly dangerous for high-risk groups.