NOBILO: It sounds like all of the worst parts of a disaster movie. Houses under water, whole cities submerged but this isn't a movie it's a real-life warning and it could be life changing for hundreds of millions of people. A staggering new report on the climate crisis is sounding the alarm. Saying rising sea levels nearly triple the previously estimated area and populations under threat. As Chad Myers explains most of those at risk are in Asia.</s>CHAD MYERS, CNN WEATHER EXPERT: Bianca, this is not about sea level rise, this is about the land being lower than we first thought. Now, the old measurements were from the space shuttle going around and measuring now what it thought was the land surface the elevation. At times it was actually measuring rooftops or treetops. Not the land below it. So now we expect 300 million people to get a coastal flood once a year because they are lower than what the original elevation told us that they were. These numbers are now much more accurate and they are much lower by two meters across the globe. So we know the sea is going up between half a meter and almost two meters as we progress up into 2100. But we didn't know was that the land was actually lower so how much lower? We'll take a look at Calcutta. This is what we knew was going to flood now this is what we think is going to flood because of the new elevation maps that have been put out. So if we go to Ho Chi Minh City, we go to Vietnam, here's what we knew was going to flood but here's now what's going to flood. So this is significant space and where people actually live very close to the water. 70 percent of them come from China, Bangladesh, India, Vietnam, Indonesia, Thailand, The Philippines and Japan. And that's where we are right now. Something else that this thing pushed ahead to 2100 as the water continues to go up. 2 million people - 200 million people will be below high tide by that time. That's just incredible. Bianca?</s>NOBILO: Chad Myers there, that's THE BRIEF. I'm Bianca Nobilo. And "WORLD SPORT" is up next.
Rising Sea Levels Threaten Hundreds Of Millions.