The situation in the Gaza Strip remains catastrophic and there is a high and sustained risk of famine across all of Gaza as long as the Israel-Hamas war continues and humanitarian access is restricted, a United Nations-backed food security report concluded Tuesday.

The Integrated Food Security Phase Classification, or IPC, found that nearly a half-million Gazans are on the brink of famine, while 745,000 are facing emergency levels of hunger. Overall, the experts said about 96% of Gazans — some 2.15 million people — are currently facing high levels of acute food insecurity that will continue at least through the end of September.

Fears of a famine in northern Gaza, projected in the IPC analysis conducted in February, have been averted for now. The analysts said the quantity of food deliveries and nutrition services provided to the north have increased, temporarily alleviating the hunger situation. But the danger remains, with 225,000 people still in emergency or catastrophe levels of food insecurity.

In southern Gaza, especially in the Rafah governorate where more than 1 million Palestinians fled seeking safety in the spring, some 70,000 people are one step away from famine and another 70,000 are in emergency levels of food insecurity, the IPC said.

The latest IPC update is based on data collected remotely from May 27 to June 4 by more than 35 experts from 27 agencies, applying standard IPC protocols. The IPC does not declare famine but provides the evidence for an official declaration to be made.

“To truly turn the corner and prevent famine, adequate and sustained levels of humanitarian assistance must be provided, including: greater availability of fresh food and better nutritional diversity, clean water and sanitation, access to health care and the rebuilding of clinics and hospitals,” the World Food Program said in a statement following the report’s release. “A broad, multi-sectoral response is urgently needed.”

The IPC experts noted that after eight months of war and a poor diet and sanitary conditions, Gazans are more vulnerable, which can increase the probability of famine occurring.

The IPC — which comprises about 18 different U.N. and non-U.N. agencies — said only an end to the fighting and sustained humanitarian access can reduce the risk of famine from happening in Gaza.

Israel denies that it obstructs aid delivery into Gaza, saying it is the United Nations and aid agencies that are not delivering aid fast enough.

Under increased U.S. and international pressure, Israel has started allowing more aid to flow into Gaza, including the north. The Israel Defense Forces, or IDF, recently began daily tactical pauses of military activity along the road from the Kerem Shalom crossing into southern Gaza so humanitarians could move aid convoys.

A breakdown in public law and order, however, has impeded aid workers’ ability to collect aid from Kerem Shalom. The U.N. says criminal activities and the risk of theft and robbery have prevented their collecting any aid from Kerem Shalom since June 18.

“As the latest IPC report makes alarmingly clear, humanitarian needs inside Gaza are catastrophic, and humanitarian assistance must be scaled up and reach all in need across all of Gaza,” U.S. Ambassador Linda Thomas-Greenfield said at a U.N. Security Council meeting Tuesday about the situation in the Middle East.

She said the Biden administration continues to press Israel to create better conditions to facilitate aid delivery inside Gaza, including to improve the mechanism that coordinates aid deliveries with the Israeli military to prevent attacks on aid convoys.

“The figures in this report are a shameful testament to the failure of world leaders to heed earlier warnings and hold Israel to account for its deliberate use of starvation as a weapon of war,” said Sally Abi Khalil, international charity Oxfam’s regional director for the Middle East. “The slight improvement of conditions in the north shows that Israel can end human suffering when it chooses — but just as quickly those gains can vanish when access is again constrained, as the report warns it is now.”