How can workers be protected from extreme heat?

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Nearly 19,000 people die every year due to workplace injuries attributed to excessive heat, and an estimated 26.2 million people are living with chronic kidney diseases linked to workplace heat stress, according to this month's report by the U.N.'s International Labour Organization (ILO).

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People working outside are among those most at risk from extreme heat - from farm labourers to construction workers and gig workers, who often lack regular breaks or access to drinking water while out delivering orders.

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Countries including Spain have set heat exposure and maximum temperature limits for outdoor workers, and many in the Middle East enforce midday work bans and rest breaks when temperatures soar to dangerous levels in the summer months.

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In the Philippines, record temperatures in recent weeks led thousands of public schools to switch to online classes as the heatwaves took a toll on the health of both teachers and students. They were also allowed to wear cooler clothing, instead of uniforms.