Dozens of people have died and thousands have been treated for heatstroke while performing the annual Muslim Hajj pilgrimage to Mecca amid extreme temperatures of up to 49 degrees Celsius (120 degrees Fahrenheit).

At least 41 Jordanians, 35 Tunisians and 11 Iranians are among the dead, according to authorities in each country. A further 22 Jordanians are missing and 26 Iranians have been hospitalized, the Iranian Red Crescent announced Wednesday, according to Iran’s semi-official Tasnim news agency...

The death toll is likely to rise, as Saudi Arabia and Egypt have yet to release official figures. Additionally, the governments are only aware of pilgrims who have registered and traveled to Mecca as part of their country’s quota – more deaths are feared among unregistered pilgrims.