More pilgrims have traveled from abroad this year than last year, according to Saudi officials.
More than 30,000 Iranians have made it there, about a third of the 86,000 originally expected. The war is one explanation for the decrease, writes Iran's state news agency IRNA.
In recent days, temperatures have reached 44 degrees Celsius in Mecca, and Saudi authorities are urging pilgrims to drink plenty of water and protect themselves from the sun. Because men are not allowed to wear hats, many are using umbrellas to shield themselves from the sun.
All Muslims who can afford it and are in sufficient health are expected to make the pilgrimage to Mecca at least once in their lifetime.
