The annual Hajj pilgrimage begins Wednesday in Mecca, Saudi Arabia, with over 1.4 million international pilgrims arriving. This year's pilgrimage presents significant logistical and heat challenges. Last year's Hajj saw over 1300 deaths, many unregistered pilgrims lacking access to heat protections. Saudi Arabia is focusing on safety improvements for this year's event.

Prepared by Emily Rhodes and reviewed by editorial team.