The UK Government has pledged an extra £3 million to stamp out cholera in Haiti in the wake of the devastating Hurricane Matthew.
As part of the package, the UK is supporting the shipment of one million doses of the vaccine for the deadly disease to the island, the Department for International Development (Dfid) said.
International Development Secretary Priti Patel said: "As the death toll rises and the scale of this devastating hurricane becomes evident, the UK is continuing to do everything it can to help all those affected by this tragedy.
"With the threat of a major cholera spike growing, global Britain will play its part to ensure expertise and support can make a real difference to people in urgent need."
Sunday's announcement brings the UK contribution to the Haiti crisis to £8 million.
The aid will provide shelter kits for 5,000 people, as well as temporary shelters, equipment to purify and carry safe drinking water, and solar lights to reach 12,500 of the most vulnerable people, including women and children.
A team of Dfid experts are in the region working with NGOs and the UN to help those in urgent need.