Although anyone at any time can suffer from heat-related illness, some people are at greater risk than others.
Infants and young children are sensitive to the effects of high temperatures and rely on others to regulate their environments and provide adequate liquids.
People 65 years of age or older may not compensate for heat stress efficiently and are less likely to sense and respond to change in temperature.
People who are overweight may be prone to heat sickness because of their tendency to retain more body heat.
People who overexert during work or exercise may become dehydrated and susceptible to heat sickness.
People who are physically ill, especially with heart disease or high blood pressure, or who take certain medications, such as for depression, insomnia, or poor circulation, may be affected by extreme heat.
Visit adults at risk at least twice a day and closely watch them for signs of heat exhaustion or heat stroke. Infants and young children, of course, need much more frequent watching.