The UN has launched its biggest ever appeal in response to a natural disaster.
It says it needs more than $1.4bn for the victims of the earthquake in Haiti.
The short-term priorities are emergency shelter and sanitation facilities, which are becoming more urgent as the rainy season approaches.
The UN says more than 1m Haitians still need both.
Launching the appeal in New York, UN Secretary-General Ban Ki-moon said: 'As the rainy season is coming to Haiti, it will be extremely important to provide on a priority basis shelters, sanitation and other necessary humanitarian assistance.
'We are with you,' Mr Ban said to the people of Haiti. 'We will help you to recover and rebuild.'
Former US President Bill Clinton stressed the need for donors to follow through with their commitments.
'Pledge less and give it. And do it sooner than later,' he said.
The Government has reacted to the UN's call by confirming it will give a further €800,000 to three Irish aid agencies working in Haiti.
The funding, announced by Minister of State for Overseas Development Peter Power, will be given Concern, World Vision and Haven.
Irish businessman Denis O'Brien has been named a goodwill ambassador for the city of Port-au-Prince.
His company Digicel is the single largest investor in the country.
The Digicel Relief Fund has donated $5m to NGOs in country since the earthquake.
Meanwhile, the two US citizens charged with kidnapping were sent back to jail yesterday after the judge said he would visit the orphanage where they claimed they planned to take the kids.
Another eight US citizens were released Wednesday, but the charges have not been dropped. They have since returned home.
