Around 30 Britons sheltering in a sports stadium after Hurricane Katrina are being re-located to hotels in Texas, the Foreign Office said.
The situation inside the Superdome is desperate
The move comes after stories emerged of violent confrontations, bullying and shortages of food and water at the Louisiana Superdome in New Orleans.
Overall, the Foreign Office said there were around 100 British people in Louisiana when the hurricane struck.
Relatives and friends can call the UK government helpline: 0207 008 0000.
A Foreign Office spokesman said: "There were 20 to 30 British people in the dome, and they are being moved out to hotels in Dallas and Houston and other places in Texas.
"There is a lot of confusion about what is happening at the moment, but we are working closely with the US authorities to try to get a clearer picture."
The Camp America organisation, which provides work placements for young adults, said earlier they believed one of their workers, from Epsom in Surrey, was still in the dome.
A Camp America spokesman said they would do everything possible to get him to the safety of a hotel as soon as possible.
The Daily Mirror carried extracts from the diary of Jamie Trout, 22, one of the Britons trapped in the dome for four days, who said it was "like Lord of the Flies".
Mr Trout's brother, Jonathan, from Sunderland, told BBC News his brother had now been transferred to the nearby Hyatt Hotel, along with most of the other stranded Britons and other foreigners.
Another Briton, Keith Nelson, said his son, Will, had also now been moved from the Superdome after three days.
He told the BBC: "On the third day the army told them that it was getting too dangerous so they moved them to another, smaller stadium.
"Some of the army got shot and the army refused to go into the dome so they moved them again to the Hyatt hotel."
A number of UK families are still waiting for news of their loved ones.
Mark Hashmy, 36, sent his mother a text message on Monday describing the destruction he had witnessed.
"Disaster area, no power for weeks, freeway flooded and blocked, and they can't fix.
"No shops, no food, no petrol, no nothing! Army helicopters everywhere. We are isolated."
Gloria Hashmy, of Kingsbridge, south Devon, has not heard from her son since the text and is desperate for news.
She told the Western Morning News: "I'm in absolute turmoil and I'm not going to know anything till God knows when."
Mark Graydon, from Stanford-le-Hope, Essex, and his 23-year-old American girlfriend Gretchen sought refuge in the Superdome last Sunday.
His father, John Graydon, said the British authorities told him on Thursday his son would be moved from the dome within 24 hours. By Friday evening he had not heard anything more.
Elizabeth Pond was relieved to hear from a friend that father Alan, 59, had not been hurt in the hurricane.
Ms Pond, 30, had been due to leave the UK and move to New Orleans permanently, shipping all of her belongings already, but now does not know how long it will take for normality to return.
Claire McMath, from Bristol, said she had been immensely worried about her great aunt and uncle and cousins.
They had been stopped from escaping because one of the family is disabled and unable to move.
"The house was crushed by a tree and the neighbours had to pull them out."
In addition to the Foreign Office hotline, there is also a 24-hour contact number for the British consulate in Houston, which is 001 713 659 6270.