Tropical Storm Humberto will strengthen into a hurricane over the weekend and may cause damage along the southeastern Atlantic coastline this weekend and into early next week. Here's latest from the ...

The impacts from slow-moving tropical storms and hurricanes can be drawn out over several days in a particular location. Rainfall flooding is a particularly dangerous concern.

None of the three main options could handle another Hurricane Harvey, but they would give varying benefits based on different sizes, costs and timelines.