Summer months in the D.C. metropolitan area mean outdoor activities and HEAT! While the excessive heat can be uncomfortable, it can also be unsafe. The good news is that most heat-related illness can be prevented. Those poplations most susceptible to heat-related illnesses are infants and toddlers, the elderly, people working in a hot environment, and individuals with chronic illnesses. However, even young and healthy individuals can succumb to heat if they participate in strenuous physical activities during hot weather without taking proper precautions.