Exposure can also lead to heat cramps muscle pains and spasms, usually of the extremities, caused by heavy exertion, which triggers loss of water through heavy perspiration. Another dangerous effect is heat exhaustion, a mild form of shock marked by heavy sweating, weakness, cold, clammy skin, a weak pulse, fainting and vomiting. A garden hose provides instant relief during a heat wave. To prevent heat stress, people should acclimate their bodies to heat by spending more time outside. Wearing lightweight, light-colored clothing also helps the body stay cool.
Experts also advise people to be mindful of the mercury.
They say to use caution if the heat index is 85 to 94 F when physical activity may cause fatigue. Use extreme caution, experts warn, when it is between 95 and 105 F because possible heat cramps and heat exhaustion with prolonged exposure can occur. When the heat index is above above 105 F, heat strokes are possible and heat exhaustion and heat cramps are likely. The American Red Cross provides comprehensive heat wave information on its website. To learn more, click here .