Many jobs expose us to extreme heat, putting us at risk of heat stress. If unchecked, heat stress can lead to heat rash, exhaustion, cramps, or heat stroke. Heat also increases the risk of injuries due to sweaty palms causing loss of grip, safety glasses slipping off, and dizziness leading to falls. Additionally, touching metal tools left in the sun can cause painful burns

Heat stress can affect anyone working outside, especially during the summer. The risk is real whether you’re changing dispenser filters under direct sunlight, walking on hot pavement, or working in construction with little to no shade.

Both new and seasoned employees should acclimate to the heat gradually. Take it slow when working in the heat, and build your tolerance over a few days. If you’ve been away on vacation, remember you will need a few days to rebuild your heat tolerance when you return.

Acclimatization: How Your Body Builds Tolerance to Heat (OSHA)

• Increased Sweat Production: Enhances evaporative cooling.
• Lower Salt Content in Sweat: Reduces the risk of electrolyte imbalances and heat cramps.
• More Efficient Heat Dispersion: Slower heart rate and body temperature increase.
• Increased Blood Flow to the Skin: Improves cooling through the skin.

Acclimatization can be more challenging for people who are older, overweight, have high blood pressure, or take medications that react adversely to sunlight or extreme heat.

Tips to Prevent Heat Stress

• Stay Hydrated: Keep cold water and electrolyte drinks on hand.
• Monitor Work Schedules: Schedule new workers for shorter shifts and allow frequent breaks.
• Training: Educate new workers about heat stress, symptoms of heat-related illnesses, and the importance of rest and hydration.
• Look Out for Each Other: Watch for your coworkers’ heat stress symptoms. If someone shows symptoms, stop work immediately, initiate first aid, and never leave them alone.

It typically takes 1-2 weeks to fully acclimate to working in the heat. Once acclimated, workers should be able to handle a normal workday safely. Stay safe and stay cool!