Around 400 residents in east Rhyl were forced to leave their properties when severe storms breached the sea defences in December 2013.
Chaz Moore, whose bungalow was flooded when the sea wall collapsed, said it was a "risk" living in the area.
The third and final phase of Â£1.1m of improvements by Denbighshire Council is due to start on Tuesday.
Cllr David Smith, of Denbighshire Council, admitted the flooding was a "major catastrophe" and major work had been done to protect properties from a repeat of three years ago.
"It will be a lot safer knowing what we know now, but the one thing that I cannot say, that no one can say, is that it will not happen again," he said.
"It is as safe as we can do it."
Mr Moore, who had only been living in his home for six months when the storms hit, said about 18in of water flooded through his bungalow.
Watching back his home video of the floods, Mr Moore said: "If you listen to the soundtrack, my wife is on the phone to her sister, saying 'we need someone to part the sea for us'.
"We definitely feel safer, we have got to say that, it is a risk living here, but the benefits are great."
The work will involve the construction of a new storm water "outfall" which will pump out the flood water from a holding lagoon at the golf club, channelling it out to sea during low tide.

The Vikings led the table after winning six of their first seven games but slipped from the top after losing to Warrington on 25 March.
Betts' side currently lie in fifth place in the table and face league leaders Warrington again on Friday.
"I don't see our form being that bad, we've just lost some games," Betts told BBC Radio Merseyside.
"We've lost some momentum to look at the table, but internally we're still doing some good things."
After conceding 108 points in their opening seven matches, Widnes' fortunes have changed of late, with the Vikings conceding 103 points in their last four games.
"It's about doing the little things well, keeping the confidence high and doing the things we did at the beginning of the year with the same kind of determination," he added.
"We know we've got to get moving back in the league but Warrington are saying the same thing and there are guys who are fighting to get some momentum in their league positions."
Work is set to begin on a pump to protect hundreds of flood-hit homes in Rhyl from the tides.
[NEXT_CONCEPT]
Head coach Denis Betts is not worried about Widnes' recent form despite four consecutive Super League defeats.