Tens of thousands of Palestinians have been left destitute by Israel's three-week offensive against Hamas militants in the Gaza Strip, the UN estimates.
The United Nations says that some 50,800 people are now homeless and 400,000 are without running water.
Correspondents in Gaza City say entire neighbourhoods have been flattened and bodies are still being recovered.
Palestinian medical sources say at least 1,300 Palestinians have been killed and 5,500 injured during the conflict. Thirteen Israelis have been killed since the offensive began on 27 December.