Sandbags...just incase....get sandbags...its the only thing that will help you if you really do get
SEVEN FEET of flooding
Out Store uses Sandbags because the firedoor has this small hole underneith it, and a big depression outside...everytime it rains heavy the depression fills with water and without the bags, it starts to come into the store under this blasted door

Its the only time in my life I have EVER seen real sandbags...
...ohh...except once when I went to Eden Camp on a school trip
http://www.edencamp.co.uk/