Is your door rated for wind? For debris impact? If you don’t know, most likely it isn’t. Look for indications a door will perform poorly.
Once a door is compromised, winds and missiles can threaten your cars, your home’s interior, and your roof.
Don’t adjust or replace springs yourself. They are very strong and under intense torque.
Backing your car against the door might help brace the bottom panel from inward pressure, but will do nothing to protect from outside forces and will only to expose the car more should the door fail.
Even if you brace the door, debris can still knock out panels and create a large opening for wind or rain.