Living in that climate (it seems you listed everything but hurricanes), the first thing you need to address is your husband's mindset, because his seems to be defective. Unfortunately, if he doesn't get it by now, it will take a disaster that strikes too close to home to shift his view on preparedness.

Set the example. Don't talk -- Do. Find a way to store extra food that you already eat (not "survival" food). Just buy more of it a little at a time and find a way to rearrange what you have to be more efficient.

A car kit is easy, it stays in your car. If a disaster strikes while you're at home your car is likely parked there too so those supplies aren't wasted.

Good luck, stay in touch here.