RIYADH — Deadly incidents during the annual Muslim Hajj pilgrimage to Mecca, in Saudi Arabia, are not uncommon. But this year, some 900 pilgrims have reportedly died, with authorities attributing the deaths to temperatures that have reached 50 °C (122 °F). For the latest news & views from every corner of the world, Worldcrunch Today is the only truly international newsletter. Sign up here. Most of the dead were from Egypt. Many are still searching for missing relatives. Last year, more than 200 pilgrims, mostly from Indonesia, died during the Hajj, which is one of the largest religious gatheri…