Who's at risk for heat illness?

Heatstroke and heat exhaustion are potentially deadly conditions stemming from a dangerous rise in body temperature. While everyone is at risk of a heat-related illness, some people are especially vulnerable.
The U.S. National Safety Council says the following people should take extra care to keep cool and hydrated during the stifling heat of summer:
Senior citizens, babies and young children, people with heart conditions, circulatory problems or other chronic illnesses, anyone who has to work outside in the mid-day heat, people who exercise outdoors frequently, people who take medication that affects sweat production and people who abuse drugs.
(Source: HealthDay News)