Judy Woodruff:

As hurricanes become more intense and wetter due to climate change, massive flooding events from hurricanes like Florence and Harvey may become even more severe and occur more frequently.

Yet surprisingly little is known about the contaminants lurking in storm waters afterward and their impacts on human health.

Special correspondent Cat Wise reports now from North Carolina, where there's an effort under way to change that.

It's part of our weekly look at the Leading Edge of science, technology and health.