Warm sunshine and sandy beaches make south Florida and its crown city, Miami, a haven for tourists, but the area is increasingly endangered by sea level rise, experts said Tuesday. During a special Senate hearing held in Miami Beach, Senator Bill Nelson described south Florida as “Ground Zero” for climate change and its threats to coastal communities. The perils for Miami are particularly concerning because it has the most assets at stake in the world in terms of assets like homes, beachfront hotels and businesses, according to the World Resources Institute, a global research firm. Not only is there $14.7 billion in beachfront property, but Miami is also home to the world’s fourth largest population of people vulnerable to sea level rise, the WRI said. Nearly 20 million people live in the entire state of Florida, and about three quarters live on the coast, said Nelson. - Waters rising - The waters around south Florida are rising fast.