Working in the Heat

High temperatures and humidity, indoors or outdoors, can make it difficult for workers to handle heat without the proper controls in place.

Prevent heat-related illnesses

Shade: Set up shade structures or use buildings and trees to shield workers from the sun.

Scheduling tasks: Avoid strenuous tasks between 11 a.m. and 3 p.m. when the sun is at its strongest.

Breaks: Encourage workers to rest and cool off in the shade or in an air-conditioned area.

Hydration: Remind workers to drink a cup of water every 15 to 20 minutes, even if they don’t feel thirsty.

Skin protection: Provide sunscreen with a minimum SPF 30 and UVA/UVB protection and give workers time to re-apply it every two hours and after sweating.

Clothing: Outdoor workers should wear light, loose-fitting clothing, UV-rated sunglasses and wide-brimmed hats.

Signs of heat stroke

• High body temperature
• Headache
• Nausea
• Hot, dry skin
• Confusion
• Loss of consciousness
• Strange behaviour

Heat stroke is a medical emergency. Call 911 immediately and stay with the worker until help arrives.

Signs of heat exhaustion

• Cold, pale, moist skin
• Difficulty with skilled work or heavy tasks
• Dizziness
• Fatigue
• Feeling faint
• Headache
• Heavy sweating
• Increased irritability
• Muscle cramps
• Nausea
• Trouble concentrating

How to respond to heat exhaustion

Move the worker to a cooler, shaded location

Remove as much clothing as possible, including socks and shoes

Apply a cool wet cloth or ice to their head, face or neck

Give water, clear juice or a sports drink if they are awake and able to drink

Seek medical help if symptoms don’t improve

Stay with them until help arrives