Important personal documents (identification, insurance policy)
Emergency cash
A torch, spare bulb and batteries
A battery powered or wind-up radio
Rubber gloves
A first aid kit and essential medication
Baby essentials
Wash kit
Important phone numbers
A disposable camera.

If a flood warning is issued, add:

Wellington boots
Waterproof and Warm clothing.
Special dietary foods and some bottled water
Mobile phone and charger