Gaza’s health ministry said a two-week old boy named Mohammed Abu al-Khair had died of hypothermia on Monday, two days after he had been admitted to hospital and placed in intensive care. Another 11 people had so far died after the war-damaged buildings where they were sheltering collapsed, it added.

A spokesman for the Hamas-run Civil Defence agency, Mahmoud Bassal, put the death toll higher. He said in a video that a total of 17 people, including four children, had died because of building collapses and the cold.

He added that 17 residential buildings had collapsed completely because of the wind and rain and that another 90 buildings had collapsed partially.

On Tuesday, video footage showed first responders from the Civil Defence recovering the body of a man from the rubble of a building in Shati refugee camp, north-west of Gaza City. Its roof had collapsed suddenly, according to eyewitnesses.

“We call on the world to solve our problems and rebuild the territory so that people can have homes instead of being displaced and living in the streets,” said Ahmed al-Hosari, a relative of the man, told AFP news agency.

The International Committee of the Red Cross (ICRC) said the collapse of damaged buildings due to the severe weather conditions was “deeply concerning”.

It stressed the need for “increased and sustained humanitarian assistance to respond to urgent and long-term needs, including food, shelter and equipment for the repair of critical infrastructure”.

Cogat, the Israeli military body which controls Gaza’s border crossings, has dismissed claims of deliberate aid restrictions as “inconsistent with facts on the ground, and the ongoing co-ordination taking place daily”.

It says that between 600 and 800 lorries carrying humanitarian supplies enter Gaza daily, and that almost 310,000 tents and tarpaulins have been delivered since the start of the ceasefire, along with more than 1,800 lorry loads of warm blankets and clothing.

The UN says a total of 67,800 tents, 372,500 tarpaulins and 318,100 bedding items have been collected from crossings over the same period.

The second phase of the ceasefire between Israel and Hamas includes plans for the reconstruction of Gaza, along with post-war governance, the withdrawal of Israeli troops, and the disarmament of Hamas.

Last week, Israel’s prime minister said the second phase was close, with only the body of one dead Israeli hostage in Gaza still to be returned by Hamas as part of the first phase.

The war was triggered by the Hamas-led attack on southern Israel on 7 October 2023, in which about 1,200 people were killed and 251 others were taken hostage.

More than 70,600 people have been killed in Israeli attacks in Gaza since then, according to the territory’s health ministry.