Out of nearly 4,500 homes that are at risk of flooding just four are registered on a flood alert scheme.
Of those, 885 are considered as high risk and the Environment Agency is now working to make people aware that their property is in danger.
Jo Slimin, community engagement officer, said: "We haven't done previous work in Aylesbury before and my target audiences are people that are vulnerable.
"We want to get to those that are the least able to respond."
The agency hopes to target are people over 65, young families and the unemployed or blue collar workers.
HOMES AT RISK:
- Central: 1,673 (403 high risk)
- Southcourt: 2,382 (115)
- Weston Turville: 412 (361)
A letter was sent out to homeowners recently asking them to make sure their insurance policies are up to date. This was thought by some to be a scam, but Mrs Slimin assured a local area forum panel on Monday that the letters are indeed genuine.
A home that considered a high risk is where there is a one in 100 year chance (1 per cent) of a flood happening and a home at risk has a one in 1,000 year chance (0.1 per cent) of flooding.
Mrs Slimin said some people do not register to their service because they do not want to admit that their home is at risk to insurers, but insurers have that information already.
To find out if you are at risk or to register to Floodwatch click here or contact 08708 506 506