Hurricane Florence offers a glimpse of the rising dangers posed by tropical storms and other major weather systems to American coastal states. Populations in these regions are steadily rising, not just along the beach, but inland as well. With ocean temperatures rising, hurricanes and tropical storms transport vast amounts of rain to these inland communities, causing catastrophic flooding. Hurricanes Harvey, Matthew, and Florence are part of a perfect storm of rising vulnerability and rising threat. Sadly, they also show how unprepared we are for this new breed of natural disaster.