Holy Sites (IMAGE) American Geophysical Union Caption These are holy sites in and by Mecca where important practices during Hajj take place. Pilgrims in these areas during future summer Hajj events run the risk of extreme heat stress. Credit AGU Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.