The United Nations University Institute for Environment and Human Security estimates that 50 to 200 million of the world’s most vulnerable people could be displaced by 2050 due to climate change. And those numbers will increase dramatically by the end of the century. The greatest flood of climate refugees is likely to come from the Middle East and North Africa, which experts predict will begin happening in the next couple of decades. By the end of the century, those regions will be inhospitable, with choking dust storms and long-lasting heat waves increasing average daily temperatures to 50°C (~122°F). That means that by the end of the century, over 500 million people from those regions will be forced to seek refuge in other parts of the world or face extreme hardship and death in their homelands.