Millions of Muslim pilgrims arrived in Mina on Monday to begin the annual Hajj rituals [1].

This pilgrimage represents one of the most significant religious events in the world, requiring a massive logistical effort by Saudi Arabia to manage the influx of millions of people into a concentrated area. The event occurs this year amid regional hopes for an end to the war in the Middle East [2].

The arrival in Mina, a tent city adjacent to Mecca, marks the official start of the pilgrimage on the Day of Tarwiyah [3]. Pilgrims gather here to perform specific rituals as part of their religious duty [2].

Estimates of the crowd size vary among reports. More than 1.5 million pilgrims descended on Mina [4], while other reports said about 1.8 million Muslims have arrived in Makkah [5].

Environmental conditions pose a significant challenge for those participating. Temperatures in Mina have reached 47 °C [6]. This extreme heat requires pilgrims and officials to implement strict health and safety measures to prevent heat-related illnesses.

The journey involves several stages across different holy sites. After spending time in Mina, pilgrims will move toward the plains of Arafat and later the Jamarat bridge to perform the symbolic stoning of the devil. The scale of the gathering remains one of the largest human congregations on earth each year.

More than 1.5 million pilgrims descended on Mina

The commencement of Hajj under extreme weather conditions and regional instability underscores the physical and political complexities of the pilgrimage. The disparity in pilgrim counts—ranging from 1.5 million to 1.8 million—reflects the difficulty of tracking real-time movement in the tent city, while the 47 °C heat increases the risk of medical emergencies during the rituals.