A construction supervisor notices signs of heat exhaustion in a worker on a hot day. According to Cal/OSHA heat illness prevention standards, what is the required immediate response?
Correct Answer
C) Call 911 and begin emergency response procedures
Cal/OSHA Section 3395 requires immediate emergency response, including calling 911, when an employee shows signs of heat illness. Heat exhaustion can quickly progress to life-threatening heat stroke.
Why This Is the Correct Answer
Cal/OSHA Section 3395 mandates that when any employee shows signs of heat illness, the employer must implement emergency response procedures immediately, which includes calling 911. Heat exhaustion is a medical emergency because it can rapidly progress to heat stroke — a life-threatening condition that causes organ failure and death. Waiting to see if a worker improves is not an acceptable response under the standard.
Why the Other Options Are Wrong
Option A: Provide cool water and monitor for improvement
Providing cool water and monitoring is appropriate for mild heat-related symptoms or as a preventive measure, but once signs of heat exhaustion are present, Cal/OSHA requires immediate emergency action — not a wait-and-see approach. Delaying 911 can allow the condition to escalate to heat stroke.
Option B: Give the worker a 15-minute break in the shade
A 15-minute shade break is a preventive cool-down rest period, not an emergency response. Cal/OSHA distinguishes between prevention measures (shade, water, rest) and emergency response procedures. When heat illness symptoms appear, the emergency response protocol — including calling 911 — must be activated.
Option D: Send the worker home for the remainder of the day
Sending the worker home is dangerous and violates Cal/OSHA requirements. A worker experiencing heat exhaustion should not drive or be left unsupervised. The standard requires emergency medical services to be contacted, not informal dismissal of the affected employee.
Memory Technique
Remember: 'Heat Exhaustion = 911, No Exception.' The word 'exhaustion' sounds less severe than 'stroke,' but Cal/OSHA treats visible symptoms as an emergency. Think of the progression: Prevention → Precaution → Emergency. Once you see symptoms, you are in Emergency territory.
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