The Haitian Red Cross has said that between 45,000 and 50,000 people were killed by Tuesday's earthquake, with a further 3 million hurt or homeless.
Eyewitnesses say around one thousand bodies are lying outside Port Au-Prince's general hospital, with pick up trucks lining up to deliver more corpses to a morgue there.
The Taoiseach Brian Cowen has said Ireland will do all it can to help and is sending a team of three experts to assess the requirements on the ground.
A larger team will then be dispatched.