I’m pro-fog.
I don’t know how I feel about flooding as a weather effect, given the geographical location. I think weather effects should be ‘typically experienced weather’ with more severe weather effects being sufficiently rare or not implemented at all. But then again, how common are salt-water swamps in New England? Hell if I know.
However, I do think there should be more flooded locations. Basements in certain locations will always be prone to flooding. Additionally, sprinkler systems will ruin entire skyscrapers if they’re not properly turned off. I don’t think it should be an extension of the weather, but I do think there should be more flooded locations.