There is a new threat to human's survival. That threat is called atmospheric rivers. Atmospheric rivers occur when large masses of water get pulled up into the atmosphere. These can dump water very quickly. Turning in-land areas into rivers in no time. What does this have to do with global warming? Well, warmer waters provide more energy, making water more susceptible to hurricanes and to being brought into the atmosphere via condensation. So therefore more water goes into the atmosphere forming bigger/more rainclouds. This shows global warming is happing now.