The actual quote is a little more circumspect than you portray it to be.

https://www.wsj.com/opinion/free-expression/al-gores-long-an...

> The then-senator claimed that “according to some predictions”—no specifics were offered—“in the next few decades,” “up to 60 percent of the present population of Florida may have to be relocated.”

It's possible to be right on the substance and wrong on the timing. See https://en.wikipedia.org/wiki/Michael_Burry 's investor revolt.

https://finance.yahoo.com/news/floridas-private-home-insuran...

> Active private home insurance policies in Florida declined by 78% over roughly a decade, with the state's insurer of last resort skyrocketing to 63% of the market share, as reported by PRNewswire and republished on Yahoo. That is a dramatic pullback in a state where storm risk has long shaped the housing market.

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