Climate change may make parts of the Middle East too hot for human beings, according to a new study. Researchers from the Max Planck Institute for Chemistry and the Cyprus Institute studied weather conditions in the Middle East since 1970. The researchers say “very hot” days in the area have doubled over that period. Right now, over 500 million people live there. “In [the] future, the climate in large parts of the Middle East and North Africa could change ,” says Jos Lelieveld, director at the Max Planck Institute and a professor at the Cyprus Institute. He added that because temperatures could get so high, those living in the area could be at risk. Researchers say temperatures in summer in the Middle East and North Africa will continue rising. The nights and days will be hotter, too. The researchers believe that by 2050, temperatures will not fall below 30 degrees Celsius at night in the hottest part of summer.