A new scientific analysis warns that human-caused climate change is making the annual hajj pilgrimage in Saudi Arabia hotter and less safe. The World Weather Attribution (WWA) group reports that global heating is narrowing the “safe window” for the event, increasing the likelihood that pilgrims face extreme heat conditions. Several outlets describe Mecca’s changing climate and note that the risk extends beyond traditional peak summer periods: dangerous temperatures are increasingly likely even in months outside summer, including spring. Because the hajj draws very large crowds—millions of Muslims over time and hundreds of thousands participating in any given year—heat stress can quickly become a public health concern. The reports say the added heat raises the risk of heat exhaustion and heat stroke, and that the overall safety margin for outdoor mass gatherings is shrinking as the region warms. The coverage aligns on the core findings: warming trends linked to climate change, a reduced period when conditions are safer, and a growing danger to pilgrims during the hajj in Mecca and western Saudi Arabia.