More than 1.7 million people participated last week in the annual Islamic pilgrimage to Mecca in Saudi Arabia—consistently one of the world’s largest mass gatherings.  Muslims are expected to perform Hajj at least once in their lives, but an increasingly perilous threat looms over the holy journey: heat.  When the Hajj took place in mid-June … Continue reading Heat Is a Growing Threat to the Hajj—Even in Spring