For years, scientists have warned about the dangerous consequences of climate change, and many dire outcomes are more urgent than most people realize. A new report shows sea-level rise will threaten homes and properties in hundreds of counties along the coast of the United States. As William Brangham reports, it could make many places unlivable and take an enormous economic toll. Stream your PBS favorites with the PBS app: https://to.pbs.org/2Jb8twG  Find more from PBS NewsHour at https://www.pbs.org/newshour  Subscribe to our YouTube channel: https://bit.ly/2HfsCD6  Follow us: TikTok: https://www.tiktok.com/@pbsnews   Twitter: http://www.twitter.com/newshour Instagram: http://www.instagram.com/newshour   Facebook: http://www.pbs.org/newshour  Subscribe: PBS NewsHour podcasts: https://www.pbs.org/newshour/podcasts Newsletters: https://www.pbs.org/newshour/subscribe