A better way to measure heat stress

Air temperature alone doesn’t capture how heat affects humans. Temperature and sunlight warms our skin. Humidity and wind speed contribute to sweating and cooling. Wet bulb globe temperature (WBGT) is a metric that incorporates these variables to measure heat stress in direct sunlight.

Wet bulb globe

temperature

Air

temperature

Temperature

Humidity

Wind speed

Sunlight

Measured in sun

Although displayed in celsius, WBGT should not be confused with air temperature. To describe the risks of heat for professional football players, we used the WBGT thresholds from the Football Australia heat policy.

Wet bulb globe temperature heat stress threshold

Water

breaks

Consider

postponing

20C

22C

24C

26C

28C

30C

32C

The WBGT was 31C for a 2024 Copa America match played in Kansas City, where assistant referee Humberto Panjoj collapsed

Air temperature alone doesn’t capture how heat affects humans. Temperature and sunlight warms our skin. Humidity and wind speed contribute to sweating and cooling. Wet bulb globe temperature (WBGT) is a metric that incorporates these variables to measure heat stress in direct sunlight.

Wet bulb globe

temperature

Air

temperature

Temperature

Humidity

Wind speed

Sunlight

Measured in sun

Although displayed in celsius, WBGT should not be confused with air temperature. To describe the risks of heat for professional football players, we used the WBGT thresholds from the Football Australia heat policy.

Wet bulb globe temperature heat stress thresholds

Water

breaks

Consider

postponing

20C

22C

24C

26C

28C

30C

32C

The WBGT was 31C for a 2024 Copa America match played in Kansas City, where assistant referee Humberto Panjoj collapsed

Air temperature alone doesn’t capture how heat affects humans. Temperature and sunlight warms our skin. Humidity and wind speed contribute to sweating and cooling. Wet bulb globe temperature (WBGT) is a metric that incorporates these variables to measure heat stress in direct sunlight.

Wet bulb globe

temperature

Air

temperature

Temperature

Humidity

Wind speed

Sunlight

Measured in sun

Although displayed in celsius, WBGT should not be confused with air temperature. To describe the risks of heat for professional football players, we used the WBGT thresholds from the Football Australia heat policy.

Wet bulb globe temperature heat stress thresholds

Water

breaks

Consider

postponing

20C

22C

24C

26C

28C

30C

32C

The WBGT was 31C for a 2024 Copa America match played in Kansas City, where assistant referee Humberto Panjoj collapsed

Air temperature alone doesn’t capture how heat affects humans. Temperature and sunlight warms our skin. Humidity and wind speed contribute to sweating and cooling. Wet bulb globe temperature (WBGT) is a metric that incorporates these variables to measure heat stress in direct sunlight.

Wet bulb globe

temperature

Air

temperature

Temperature

Humidity

Wind speed

Sunlight

Measured in sun

Although displayed in celsius, WBGT should not be confused with air temperature. To describe the risks of heat for professional football players, we used the WBGT thresholds from the Football Australia heat policy.

Wet bulb globe temperature heat stress thresholds

Water

breaks

Consider

postponing

20C

22C

24C

26C

28C

30C

32C

The WBGT was 31C for a 2024 Copa America match played in Kansas City, where assistant referee Humberto Panjoj collapsed

Air temperature alone doesn’t capture how heat affects humans. Temperature and sunlight warms our skin. Humidity and wind speed contribute to sweating and cooling. Wet bulb globe temperature (WBGT) is a metric that incorporates these variables to measure heat stress in direct sunlight.

Wet bulb globe

temperature

Air

temperature

Temperature

Humidity

Wind speed

Sunlight

Measured in sun

Although displayed in celsius, WBGT should not be confused with air temperature. To describe the risks of heat for professional football players, we used the WBGT thresholds from the Football Australia heat policy.

Wet bulb globe temperature heat stress threshold

Water

breaks

Consider

postponing

20C

22C

24C

26C

28C

30C

32C

The WBGT was 31C for a 2024 Copa America match played in Kansas City, where assistant referee Humberto Panjoj collapsed

Air temperature alone doesn’t capture how heat affects humans. Temperature and sunlight warms our skin. Humidity and wind speed contribute to sweating and cooling. Wet bulb globe temperature (WBGT) is a metric that incorporates these variables to measure heat stress in direct sunlight.

Wet bulb globe

temperature

Air

temperature

Temperature

Humidity

Wind speed

Sunlight

Measured in sun

Although displayed in celsius, WBGT should not be confused with air temperature. To describe the risks of heat for professional football players, we used the WBGT thresholds from the Football Australia heat policy.

Wet bulb globe temperature heat stress thresholds

Water

breaks

Consider

postponing

20C

22C

24C

26C

28C

30C

32C

The WBGT was 31C for a 2024 Copa America match played in Kansas City, where assistant referee Humberto Panjoj collapsed

Air temperature alone doesn’t capture how heat affects humans. Temperature and sunlight warms our skin. Humidity and wind speed contribute to sweating and cooling. Wet bulb globe temperature (WBGT) is a metric that incorporates these variables to measure heat stress in direct sunlight.

Wet bulb globe

temperature

Air

temperature

Temperature

Humidity

Wind speed

Sunlight

Measured in sun

Although displayed in celsius, WBGT should not be confused with air temperature. To describe the risks of heat for professional football players, we used the WBGT thresholds from the Football Australia heat policy.

Wet bulb globe temperature heat stress thresholds

Water

breaks

Consider

postponing

20C

22C

24C

26C

28C

30C

32C

The WBGT was 31C for a 2024 Copa America match played in Kansas City, where assistant referee Humberto Panjoj collapsed

Air temperature alone doesn’t capture how heat affects humans. Temperature and sunlight warms our skin. Humidity and wind speed contribute to sweating and cooling. Wet bulb globe temperature (WBGT) is a metric that incorporates these variables to measure heat stress in direct sunlight.

Wet bulb globe

temperature

Air

temperature

Temperature

Humidity

Wind speed

Sunlight

Measured in sun

Although displayed in celsius, WBGT should not be confused with air temperature. To describe the risks of heat for professional football players, we used the WBGT thresholds from the Football Australia heat policy.

Wet bulb globe temperature heat stress thresholds

Water

breaks

Consider

postponing

20C

22C

24C

26C

28C

30C

32C

The WBGT was 31C for a 2024 Copa America match played in Kansas City, where assistant referee Humberto Panjoj collapsed