We should keep reality in check.
If a total collapse would happen of the sheer would happen and we see a dump/movement of between 100 Billion and 500 Billion tons what exactly would happen per the models? Assume mid range.
We can disregard what happens on the African coast firstly - namely because no one really gives a shit and yeah, their coats get battered pretty fucking bad and no one would warn them so life losses would be immense and...did I say no one really cares? , So lets talk about where everyone gives a shit - the USA.
What would happen? Really happen...
A Tsunami would approach the coast with ample times for warning to go out and surely many lives would be saved. There would be a requirement between Florida and NY to get to higher ground of around 100 feet (abundance of caution) and the Tsunami would have enough momentum to go over 30 feet of anything and probably have enough energy to go over hills close to the coast up to 50 feet in height, and as you go in land a few miles only enough energy to topple about 30 feet. The waves probably impact between 10-30 feet in height with considerable volume and force behind them.
The devastation along the coast between Florida and NY would be absolutely immense. I've spent enough time at the beaches and would could see the water running inland for several miles in many areas, and it is the suction back out that would take most people with it, and also be the final straw for most of the building as their foundations get the ground around them washed away. There would be inlets in SC and other locations that would allow the raised water level to reach deep in-land in the tens of miles and it would be a rapid rise with a rapid suction destroying tens of thousands of homes entirely and businesses. Places like Ocean Isle would effectively cease to exist altogether thereafter.
Any building that is not re-enforced within the zone of being less than 30 or so feet above ground and within a mile give or take of the shore if not destroyed will be torn down as uninhabitable.
For every mile of coast line, factor in the loss of 50 properties long, by 20 properties deep, thus 1000 dwellings per mile pretty much ruined. Plus the damaged roads and infrastructure pretty much equals 1 Billion dollars for each mile.
NY is another matter. The swell should reach and be forced into the reduced area and overwhelm the current fortifications and water would be expected to saturate deeply into NJ and Manhattan. The water will completely fill all basements and subways and the infrastructure will be utterly destroyed with repairs taking over a decade. Given the notice loss of life would be limited in NY to thousands of persons, but the damage would approach 1 to 2 trillion. New York would effectively cease to be functional in any realistic way for years and it would destroy the NY economy beyond probable recovery.
Florida is a horror story. Entirely. Sickening really.
The evacuation would have to ask most to head north or go to the West Coast. The body of water would be capable of making it in-land miles before absorption or kinetic boundaries halted it. Total Destruction of properties is expected as the sand will swirl and heave and leave foundations bare. Pretty much all structures within 2 miles inland will experience significant damage unless slightly elevated with those within 1 mile of the coast being ruined and fit for destruction only. Many areas of Florida would see the wave come in unobstructed for miles and the loss of all structures could go inland as far as 5 miles. In some areas it would be up to 20 miles.
The cost per mile of coast in Florida could easily top 2 - 4 billion per mile of coast line. Many parts of the coast would be washed away and new maps would be required. It is probable the back washing motion could eliminate land property entirely so it would not even exist to rebuild on near the coast.
The loss of life would be a cataclysmic scale even with evacuation given certain inlets would allow the thrust and concentration of water to in some parts go tens of miles and losses of life would be in the hundreds of thousands.
The intense pollution that would occur off the coast from chemicals being deposited into the ocean will be substantial and the debris will be large enough to cause a substantial biological hazard with drinking water ruined for millions of homes and the ocean cluttered with every cleaner from homes and the industrial waste would result in marine life getting hit quite hard.
Small Collapse: 100 Billion in Damages with 500 lives lost.
Mild collapse estimate: 500 Billion in damages with 5,000 loss of life.
Medium Size collapse: 1.5 Trillion in damages and 25,000 lives list.
Full Scale collapse: 4 Trillion plus in damages and 1,000,000 lives lost.
The good news about such estimations is that the odds of you proving me wrong are remote. so there. :-)
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