Mr. L is a construction worker who was working on a job site when, shortly after 1 PM on a 100°-F humid day in August, he began complaining of severe headache and dizziness.

Mr. L is a construction worker who was working on a job site when, shortly after 1 PM on a 100°-F humid day in August, he began complaining of severe headache and dizziness. He has consumed large amounts of water, but has not had any sports drinks or salt tablets. Shortly thereafter, while taking a break at the site, he fainted. Paramedics were called and found him unconscious, with a rapid thready pulse, high body temperature, and dry skin and mucous membranes.

1. What factors and behaviors have caused heat stroke in Mr. L? (See Hyperthermia—Heat Stroke.)

2. Discuss the stages of hyperthermia and causes that typically lead up to the final stage of heat stroke. (See Hyperthermia.)

3. Discuss the preventive measures that could have been taken to prevent the heat stroke and the first aid and treatment measures. (See Hyperthermia.)