Last summer was a disaster for the tiny coastal Gaza City in the Gaza Strip, as the Israeli air force along with troops pounded the city for weeks, the result of the accusation that Hamas launched terror attacks on Israel. More than 2,000 people died, thousands more were wounded and the city was almost entirely demolished.World powers that witnessed the Israeli aggression live on TV and failed to do anything, decided to donate $5.4 billion for the reconstruction of Gaza. The failure by world donors to deliver billions of dollars of aid to rebuild Gaza is jeopardizing efforts to avoid a new flare-up in the Palestinian territory, a senior U.N. official warned Wednesday. U.N. Under-Secretary-General for Political Affairs Jeffrey Feltman told the U.N. Security Council that donors that had promised $5.4 billion to the Palestinians at the Cairo Conference four months ago "have yet to fulfill the vast majority of their pledges." "This is, quite frankly, unacceptable, and cannot continue if we hope to avoid another escalation in Gaza," Feltman told the 15-member council during a meeting on the Middle East. "Failure to deliver the necessary support is putting an almost unbearable strain on an already highly fractious environment," he said. Gaza was devastated by the 50-day war in July and August that left 2,200 dead on the Palestinian side and 73 on the Israelis side, while 100,000 Gazans lost their homes.Feltman said more than 75,000 people have been cleared to receive construction material to rebuild and over 47,000 had been able to purchase building supplies. Israel was restricting the entrance of materials with the claim that the materials will fall into the hands of Hamas and will be used for launching new terror attacks. Israel's 'Hamas and terror' pretext deprived almost 2 million Palestinians from receiving vital materials to maintain their lives in humanitarian conditions. Israel has imposed the blockade since 2006 when Hamas won the elections in Gaza.The rebuilding of homes, schools and hospitals in Gaza could take more than a century to complete unless an Israeli blockade restricting imports of construction materials into the Gaza Strip is lifted, aid agency Oxfam said on Thursday. Gaza needs more than 800,000 truckloads of building materials to repair infrastructure damaged in the 2014 war with Israel, yet less than a quarter of 1 percent of the materials needed have entered Gaza in the last three months, Oxfam said.The longer the blockade continues, the more lives will be at risk, Oxfam regional director Catherine Essoyan said. "Families have been living in homes without roofs, walls or windows for the past six months. Many have just six hours of electricity a day and are without running water," Essoyan said in a statement. Around 100,000 people, more than half of them children, are living in shelters, temporary accommodation or with extended family because their homes were destroyed, Oxfam said.Less than 0.25 percent of the truckloads of essential construction materials needed have entered Gaza in the past three months. Six months after the end of the conflict, the situation in Gaza is becoming increasingly desperate, Oxfam said.Touching on the talks with Israel to lift the blockade, at least for easing the restrictions, Oxfam said: "There has been no progress on substantive talks on a long-term solution to the crisis in Gaza, which were supposed to happen after the ceasefire. Under the blockade, exports of agricultural produce from Gaza have fallen in the last year to just 2.7 percent of the level before the blockade was imposed. Fishermen are still restricted to an enforced fishing limit of six nautical miles – far away from where most fish are – and farmers are restricted from accessing much of the most fertile farmland. Gaza continues to be separated from the West Bank, and most people are still prevented from leaving. The border with Egypt has also been shut for most of the past two months, preventing thousands of people from travelling. The agency also stated that in the blockaded Gaza, more than 40 percent of people – nearly 70 percent of the youth population – are now unemployed and 80 percent of people receive aid. Furthermore, many key industries, such as the construction industry, have been decimated as essential materials are not allowed into Gaza, and exports are currently at less than 2 percent of their pre-blockade levels, with the transfer of agricultural produce and other goods to Palestinian markets in the West Bank almost entirely banned."