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An initial work/rest cycle of 1 hour work and 15 minutes rest is recommended for protection of staff when the heat stress hazard is high. The recommended cycle will be adjusted up or down based upon worker monitoring, environmental conditions and the judgment of the site safety officer. At any time, field team members recognize the signs or symptoms of heat stress prior to a scheduled rest period,they will notify the SSO immediately in order that the rest period can be called. Heat stress, if not prevented,results in heat stress illnesses. Two critical illnesses, if not recognized and treated immediately, can become life-threatening. These are heat exhaustion and heat stroke. Heat exhaustion will result if the prevention measures decided above are not implemented. Ignoring the signs and symptoms of heat exhaustion will lead to the development of heat stroke, if unsafe conditions persist. Heat stroke is immediate, life threatening condition that results because the body's heat regulating mechanisms shut down and the body cannot cool itself sufficiently. As heat is excessively stored in the body, brain damage can result causing permanent disability or death. 6. Heat Exhaustion. The signs and symptoms of heat exhaustion are headache; dizziness; nausea; weakness; fainting;profuse sweating; loss of appetite; approximately normal body temperature; dilated pupils,; weak and raid pulse; shallow and rapid breathing; possible cramps in abdomen and extremities;possible vomiting, difficulty walking; cool and sweaty skin to the touch; pale to ashen gray coloring. First aid for heat exhaustion is as follows: A. Immediately remove victim to the support area, or if you are the victim proceed to the support area. The support area for this site will be the job site office or storage container. B. Start cooling,but be careful not to cause a chill (i.e. rest in shade and apply wet towel to the forehead; open up and/or remove clothing as much as practical, especially chemical-resistant clothing). C. Drink cool water slowly, but only if conscious and not in shock. If vomiting and/or the signs and symptoms are not lessening within an hour, call for emergency help and/or transport the victim to emergency room. It is likely that a heat exhaustion victim will be unable to work for the remainder of the day. 7. Heat Stroke (aka sun stroke). The signs and symptoms of heat stroke are hot, dry skin to the touch; reddish coloring; body temperature> 105 degrees F; no sweating; mental confusion; deep, rapid breathing that sounds like snoring progressing to shallow, weak breathing, headache; dizziness; nausea; vomiting; weakness; dry mouth; convulsions, muscular twitching, sudden collapse; possible unconsciousness.