There are cities underwater in the Mediterranean basin. Sea levels rose in the distant past, but not as much since historical records. We're still technically in an ice age, and I have no idea howuch human activity really contributed to recorded temperatures. We have so little direct data, and what people assume about the past is political as much as scientific. There were thriving farms in Greenland 1000 years ago, and they grew grapes for wine in England. We know it isn't a static thing, so how much we did compared to longer cycles is open to question as far as I am concerned.

The empirical data on hurricane severity and frequency is here. It's not as bad as we might think, and the impact is due as much to population and infrastructure growth as growing severity.