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I have friends in Brunswick, GA on the coast. At high tide, their lawn is 3 feet above the water.
Two questions for the GW know-it-alls here at BAUT:
So, how long do YOU think they have before their house gets wet at high tide?
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Well let's see, Coastal Georgia gets about 110 mm of rain in August which is quite a bit and high tide happens twice a day, so my guess is it won't be long at all before their house gets wet at high tide.
But if you mean how long before their house gets wet from seawater at high tide, well sea levels are projected to rise at an average of 1-9mm a year for the next century, so it will take a while for sea levels to rise 3 feet, however an increase in sea level puts their property at greater risk of indunation during storm surges and may cause erosion and other problems.
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How much has sea level rose in the past 15 years?
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Roughly 45 mm, mostly due to thermal expansion of the oceans.
And I'm not a GW know-it-all, but thanks for complimenting the people here on BAUT on their knowledge. I like to think I make a useful contribution now and then.