For the Western US, the problems aren't so bad. There's a coastal mountain range along most of the California coast. In LA, a few places such as Venice/Marina Del Ray may need seawalls, but except for a few areas areas, three blocks inland is at least 100 feet above sea level. LAX is 121 feet above sea level.
The SF bay has more problems than the coast. Parts of San Francisco may need seawalls, and bayfront development such as Redwood Shores needs to be stopped. Google HQ is in trouble; they're on fill and only 10' above sea level. But once you're south of US101/CA237, you're OK in most of Silicon Valley.
In the southeastern US, things are potentially much worse. There's no coastal mountain range. Florida is barely above sea level now. Miami floods regularly. New Orleans is partly below sea level already.
A big question is what this does to Mississippi River flooding. A higher sea level means less river flow and more upstream flooding.
The SF bay has more problems than the coast. Parts of San Francisco may need seawalls, and bayfront development such as Redwood Shores needs to be stopped. Google HQ is in trouble; they're on fill and only 10' above sea level. But once you're south of US101/CA237, you're OK in most of Silicon Valley.
In the southeastern US, things are potentially much worse. There's no coastal mountain range. Florida is barely above sea level now. Miami floods regularly. New Orleans is partly below sea level already.
A big question is what this does to Mississippi River flooding. A higher sea level means less river flow and more upstream flooding.