Sweat, pray, love: extreme heat hounds hajj

The hajj pilgrimage can be physically draining even in ideal conditions, but worshippers this year face an added challenge: scorching sun and temperatures rising to 42 degrees Celsius (108 degrees Fahrenheit).

Muslims who have flocked to western Saudi Arabia for the five-day ritual, most of which takes place in the open air, have been confronted with a stark reminder of how warming trends are exacerbating what was already a very hot desert climate.