the other issue is about evacuation/bug out, 30 cm of water flowing fast will move a car once the situation has got to this you will need asistance. if you do evacuate and are swept away basically sit with feet pointing downstream so you can protect yourself from hazards. utilize the water to help you, dont swim against it you will loose, look for a safe point and swim towards it with all you have.
As someone with a disability and family with disabilities please look out for neighbours especially the elderly.
Prepping has to be primaraly about you and yours but when the s hits the fan and no ones available to help we have to step in.