The storm, which is one of?the strongest ever recorded in the Atlantic, has now moved on to Cuba and is headed towards Florida.
Meanwhile hundreds more British troops are expected to start landing in the Caribbean?to bolster relief efforts.
Transport aircraft are flying in from the UK, with a C-17 transporter ferrying two Puma helicopters to the area.
The amphibious assault ship, HMS Ocean, is also on her way to the region after being diverted from deployment in the Mediterranean.