Mike Tidwell is no Nostradamus. He can't predict who's the next Dancing With the Stars pair to get the boot. Tidwell is a journalist with no psychic ability but he does have crystal clear 20/20 foresight.

In 2003, Tidwell’s book 'Bayou Farewell' predicted the kind of catastrophe that Hurricane Katrina eventually made only too real. While the author was writing an article describing his adventures on shrimp boats through the wetlands of south Louisiana to the Gulf of Mexico, Cajun shrimpers pointed out the disappearing wetlands. Tidwell realized that without wetlands and barrier islands, Louisiana was virtually unprotected from hurricanes.

Through 'Bayou Farewell' he tried to warn Louisiana and the country for the coming disaster. We all know what happened next:1,800 people dead, $200 billion in damage, and a million people still displaced.

In his latest book "The Ravaging Tide: Strange Weather, Future Katrinas, and the Coming Death of America’s Coastal Cities" ($16.32), Tidwell says Hurricane Katrina is only the curtain raiser to upcoming disasters to plague America's coastal cities caused by global warming.

His new set of predictions says calamities will occur as a result of a 1-2 punch. Relative sea levels will rise and Category 5 hurricanes will hit again. Relative sea level rise is caused when coastal land sinks and sea level rises at the same time. According to Tidwell What happened in south Louisiana (coastal land sunk by 2ft and sea level rose by 1 ft due global warming hence 3ft relative sea level rise) over the last century is happening elsewhere.

"Those exact same conditions are being replicated right now by global warming along the entire U.S. coastline, especially the U.S. Gulf and Atlantic coastlines.You’re going to get the same amount of adjustment of the water climbing 3 feet closer to our coastal cities over the next 100 years just as was the case in New Orleans over the last 100 years. And hurricanes are becoming more ferocious because of global warming. "

So what can you do about it?

Tidwell says get politically loud. "There’s no substitute for political action. If you want to save... our coastal cities...stand up and say something, for God’s sake. You’ve got to tell your leaders because they’re obviously not doing anything".