Around 53 per cent of the 455,000 refugees in Lebanon are registered in 12 camps. Three other camps were destroyed during Lebanon’s civil conflict (Nabatieh camp in south Lebanon, and Dikwaneh and Jisr el-Basha camps in the Beirut area). A fourth (Gouraud in Baalbek) was evacuated many years ago.
All 12 official refugee camps in Lebanon suffer from serious problems, such as:
poor housing conditions
no proper infrastructure.
Of all UNRWA fields, Lebanon has the highest percentage of Palestine refugees living in abject poverty and registered with the Agency's social safety-net programme.
More about the social safety-net
In mid-2007, as a result of the conflict between the Lebanese Army and the extremist Fatah Al-Islam group, approximately 27,000 Palestine refugees were displaced from Nahr el-Bared camp and its adjacent areas in northern Lebanon,
The camp was pounded with heavy artillery and aerial bombardments during a three-month siege. An estimated 95 per cent of all buildings and infrastructure were either destroyed or damaged beyond repair. The first stages of a major reconstruction and recovery effort are now underway to rebuild the camp and allow displaced refugees to return to their homes.
SOURCE : UNRWA http://www.unrwa.org/etemplate.php?id=73