Well, for the snowbirds, it is the snow/ice storms that they cannot navigate. They can no longer shovel snow, walk on ice, or drive in it either. If they need access to healthcare or even basics (food, water, gas, heat, etc) they can't get out to get them. I do think there is a myth that C-19 isn't as prevalent in hot climates.
Driving in the rain is about the worst thing here or evacuating during a storm. Mosquitoes are a pain for sure but they can be managed with spraying. I just bought spray for the lawn to help with mosquitoes and ants. Now if the rain would flippin' quit, I could get out there with the hose and spray!