- Video report by ITV News Political Correspondent Paul Brand
The Armed Forces have been deployed to help with the relief effort in the Caribbean following devastation wrought by Hurricane Irma, amid criticism of the British government's response.
In a letter, two leading MPs said the government had been "found wanting".
At least 14 people have been killed so far with thousands of buildings destroyed and warnings of further storm surges to come.
Medical supplies and other aid are to be flown to the worst affected areas today following a pledge from the British Government of £32 million towards the relief effort.
A naval ship and its helicopters have already been helping to distribute aid on the British island of Anguilla, and the Navy's flagship carrier HMS Ocean has been diverted to join the relief effort.
But, in a letter to Foreign Secretary Boris Johnson, the chairs of the Commons Foreign Affairs and the International Development Committee said the response still "requires improvement".
Tom Tugendhat and Stephen Twigg said they expected the government to help in the reconstruction of communities, as well as form a plan to help the region prepare for the arrival of Hurricane Jose.
Jose was upgraded to a Category Four storm on Friday, and is set to bring more misery to the hurricane-ravaged Caribbean islands.
When questioned about the speed of response from the UK government, Foreign secretary Boris Johnson said the government was "doing everything is possibly can to help those affected".
And Theresa May, addressing concerns about the speed of Britain's response, added: "We have taken action, we moved swiftly, there are people on the ground, £32 million has been released.
"The Royal Fleets Auxiliary ship - RFA Mounts Bay - is in position providing assistance from Royal Marines and army engineers and a task group, a military task group, is on its way on HMS Ocean with several hundred UK troops."
She added the Government would "continue to do what is needed and provide what is necessary" as the storm progresses towards the US