Brehaut birdied the last four holes on his way to a five-under 65 for a three-round total of 10 under par.

Andrade, who has led since the first round, shot a second consecutive 68 to maintain his one-stroke advantage.

Canada's Ian Leggatt slipped back to third, two off the pace, after a 69, while Dan Forsman fire a seven-under 64 to tie the course record.

He jumped into a share of fourth place alongside Australia's John Senden, former USPGA champion Jeff Sluman, Steve Flasch and John Huston, who all shot 65s.

The predicted arrival of tropical storm Hanna on Sunday means that the final round will start early in an attempt to get the event finished.

"You don't know what this hurricane is doing," said Andrade. "But I sure as heck wanted the lead going into Sunday just in case something does happens where we can't play.

""My mindset going in, is tomorrow we are going to play 18 holes and there are a lot of guys that have a chance to win."

It was a remarkable effort from second-placed Brehaut, who had major shoulder surgery in January 2000 and is still not back to full fitness.

"I haven't been in this position in a long time so I'm going to have a little chat with myself before I tee off," he said.

"I missed five cuts in a row this year by one shot, and that kind of starts eating on you.

"Then you start thinking, 'I've got to make a cut.' And you know, Tiger Woods is never thinking about missing a cut."