a milder and moister summer than the southern U.S. has seen in decades?

Moister, maybe, but in Florida it has been hardly milder. In late May we were already having our 90+ deg. days and afternoon thunderstorms. That's several weeks earlier than usual. Our Summer has continued to be as hot as any in the past 25 years.

This year was forcast to be a heavier tropical storm year. The fact that 3 and maybe 4 have hit Florida, is mostly a coincidence. The storms form were conditions are right and they head in directions that are deterimined by low and high weather systems. This is an unusual year, but so is going on a winning streak in Blackjack.

That Florida has been hit so many times means that other places haven't been hit dramatically. The Texas/Louisiana Gulf Coast has been spared, as has the Yucatan, for the most part.