More than 1,300 Hajj pilgrims died this year when humidity and heat pushed past survivable limits. It’s just the start
- Written by Emma Ramsay, Research Affiliate in Climate Adaptation, Monash University
Every year, hundreds of thousands of Muslims undertake the Hajj –the sacred pilgrimage to Mecca. In 2024, the pilgrimage took place in mid-June, the start of the Saudi summer.
But this year, more than 1,300 pilgrims never made it home. Lethal heat combined with humidity proved deadly.
Our new research shows the upper limits of human heat...





