In a scathing report, eight British-based rights organizations said that more than 1.1 million people, about 80 percent of Gaza's residents, are now dependent on food aid, as opposed to 63 percent in 2006. It said that overall unemployment is close to 40 percent.
It also said that hospitals are suffering from power cuts of up to 12 hours a day, and the water and sewage systems were close to collapse.
The report follows strident international condemnation of Israel after it struck hard against Palestinian militants in Gaza, killing more than 120 in the past week, including many civilians, after Palestinians militants escalated their daily rocket fire at Israel.
Amnesty International UK Director Kate Allen said Israel must protect its citizens, "but as the occupying power in Gaza it also has a legal duty to ensure that Gazans have access to food, clean water, electricity and medical care."
The 16-page report -- sponsored by Amnesty, along with CARE International UK, CAFOD, Christian Aid, Medecins du Monde UK, Oxfam, Save the Children UK and Trocaire -- calls on the British government to exert greater pressure on Israel and to reverse its policy on not negotiating with Gaza's Hamas rulers.