Rising sea levels

FILE - In this Oct. 5, 2017, file photo, residents move a "no wake," sign through flood waters caused by king tides in Fort Lauderdale, Fla. Federal scientists, according to a report released Wednesday, July 10, 2019, predict 40 places in the U.S. will experience higher than normal rates of so-called sunny day flooding this year due to rising sea levels and an abnormal El Nino weather system. (Joe Cavaretta/South Florida Sun-Sentinel via AP)

FILE - In this Oct. 5, 2017, file photo, residents move a "no wake," sign through flood waters caused by king tides in Fort Lauderdale, Fla. Federal scientists, according to a report released Wednesday, July 10, 2019, predict 40 places in the U.S. will experience higher than normal rates of so-called sunny day flooding this year due to rising sea levels and an abnormal El Nino weather system. (Joe Cavaretta/South Florida Sun-Sentinel via AP)

FILE - In this Oct. 5, 2017, file photo, residents move a "no wake," sign through flood waters caused by king tides in Fort Lauderdale, Fla. Federal scientists, according to a report released Wednesday, July 10, 2019, predict 40 places in the U.S. will experience higher than normal rates of so-called sunny day flooding this year due to rising sea levels and an abnormal El Nino weather system. (Joe Cavaretta/South Florida Sun-Sentinel via AP)

FILE- In this Sept. 30, 2015 file photo, Louis Fernandez walks along a flooded street in Miami Beach, Fla. The street flooding was in part caused by high tides due to the lunar cycle, according to the National Weather Service. When Democratic presidential candidates meet in Miami for their first debate it'll be in what you could call the country's Ground Zero for any climate-related sea level rise. (AP Photo/Lynne Sladky, File)

FILE- In this Sept. 30, 2015 file photo, Louis Fernandez walks along a flooded street in Miami Beach, Fla. The street flooding was in part caused by high tides due to the lunar cycle, according to the National Weather Service. When Democratic presidential candidates meet in Miami for their first debate it'll be in what you could call the country's Ground Zero for any climate-related sea level rise. (AP Photo/Lynne Sladky, File)

FILE- In this Sept. 30, 2015 file photo, Louis Fernandez walks along a flooded street in Miami Beach, Fla. The street flooding was in part caused by high tides due to the lunar cycle, according to the National Weather Service. When Democratic presidential candidates meet in Miami for their first debate it'll be in what you could call the country's Ground Zero for any climate-related sea level rise. (AP Photo/Lynne Sladky, File)

FILE- In this Sept. 30, 2015 file photo, a woman gets a ride on a police truck navigating a flooded street in Miami Beach, Fla. The street flooding was in part caused by high tides due to the lunar cycle, according to the National Weather Service. When Democratic presidential candidates meet in Miami for their first debate it'll be in what you could call the country's Ground Zero for any climate-related sea level rise. (AP Photo/Lynne Sladky, File)

In this image made from video, United Nations Secretary-General Antonio Guterres addresses the Pacific Islands Forum, Wednesday, May 15, 2019, in Suva, Fiji. Guterres says he’s traveling to three South Pacific island nations to see the effects of climate change firsthand. Speaking in Fiji at a meeting with officials from the Pacific Islands Forum, the U.N. leader says he wants to learn about the work being undertaken by island communities to bolster resilience. (Fiji Broadcasting via AP)

This 2016 photo provided by NASA shows patches of bare land at the Jakobshavn glacier in Greenland. The major Greenland glacier that was one of the fastest shrinking ice and snow masses on Earth is growing again, a new NASA study finds. The Jakobshavn glacier around 2012 was retreating about 1.8 miles (3 kilometers) and thinning nearly 130 feet (almost 40 meters) annually. But the last two years it started growing again at about the same rate, according to a study released on Monday, March 25, 2019, in Nature Geoscience. Study authors and outside scientists think this is temporary. (NASA via AP)