Mother-of-two Suzanne McQueen, of Maidstone, Kent, is waiting for news of her American husband (William) Forest McQueen.
He has been working in his home country since 1997, and lives and works with his brother in the Abita Springs area, north of Lake Pontchartrain, which is north of New Orleans.
The couple married in the UK in 1991, and Suzanne said she and her daughters - aged 11 and 13 - were planning to move to the US to join her husband as soon as was possible.
Part of his job there is to maintain the grounds of an old plantation house, she said.
"I phoned the morning the hurricane hit, and his brother said Forest hadn't been home for the last 24 hours because he'd been on shift clearing up trees and lines from all the wind damage that came before the hurricane. I haven't heard anything since.
"I've been going through a list of phone numbers for friends and family in the area and can't get through to anyone.
"Up until yesterday or the day before I thought everything would be okay and that they hadn't been in touch because the power was down. But I've since seen more information about the amount of wind destruction there.
"I am getting very concerned. I am trying to contact people from work so the girls don't know how worried I am."
Family's hope for hurricane dad
A man last heard of when he went out to clear debris in the build-up to Hurricane Katrina is one of 96 Britons still missing in the US.
William McQueen's family, from Maidstone, Kent, have spent each evening calling Louisiana in vain.
On Wednesday, Susan McQueen appeared on BBC TV with her daughters to appeal for news of her husband, known as Forest.
"We just have to keep hoping that we will hear, that it will be good news, and people will be safe," she said.
The last time Mrs McQueen spoke to her estranged husband was two weeks before Hurricane Katrina hit New Orleans.
On the morning of the storm, she telephoned his brother Stephen in Abita Springs, where Mr McQueen was living.
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