This article is part of a special series from our fall 2019 climate issue on how you can level up your actions against climate change. Visit the full Climate Action Guide here. Coastal populations are on the front lines of climate change. According to Mathew Hauer, a demographer at Florida State University, 13 million Americans could be displaced by sea-level rise and natural disasters by 2100. About half will be Floridians (and a quarter Miamians). Louisiana, California, and the Carolinas will also be hard hit. But those facing floods, fires, and drought in the country’s interior might also need to abandon their homes, Hauer says. Abroad, the World Bank has estimated that 143 million people in sub-Saharan Africa, Latin America, and South Asia could be forced from their own countries by 2050. Surely a significant number will set out for the United States. Is Your Town Ready? Here are some questions your community should or might be asking itself. And...