The hostilities began just over a week after US President Donald Trump rallied billions of dollars in pledges for the territory's reconstruction and tried to nudge a ceasefire forward.
Residents say they are scared of neglect and deprivation, with Israel in the wake of the weekend strikes closing all crossings into their shattered territory of over two million people.
Palestinians told The Associated Press they were rushing to markets, haunted by memories of painful food scarcity last year under months of Israel's blockade. Part of Gaza, around Gaza City, was found to be in famine.
"When the crossings shut down, everything was suspended from the market," said Osamda Hanoda from Khan Younis.
"The prices go up, and people live in misery."
The shaky Israel-Hamas ceasefire had led to more humanitarian aid and other supplies entering Gaza, even as the United Nations and aid partners say more of everything from basic medical supplies to fuel is needed.
Now, Palestinians are hoarding again, with reports of prices rising sharply for basic goods such as bags of flour.
"We are afraid of not finding milk" and diapers for the kids, or food and water, said Hassan Zanoun, who was displaced from Rafah.
COGAT, the Israeli military body overseeing civilian affairs in Gaza, asserted the food supply inside the territory "is expected to suffice for an extended period".
It added that the rotation of humanitarian workers in and out of Gaza is postponed.
It was not clear when any crossing might reopen. Israeli authorities focused on Iran, and citizens dashed repeatedly for shelter as sirens wailed.
The war in Gaza began with the Hamas-led attack on Israel on October 7, 2023, and it's been marked from the start by restrictions on people and supplies being allowed into the territory - and terrified people, including medical evacuees in need of treatment, getting out.
A month ago, Gaza's main Rafah border crossing with the outside world - its only crossing not with Israel - reopened, allowing a small and tightly controlled flow of Palestinian traffic in both directions. No cargo was allowed through.
Now all crossings are closed again in the middle of the holy Muslim fasting month of Ramadan, a time of chosen deprivation, evening feasts and prayer. Images have shown Palestinians lined up at long tables in the middle of bombed-out debris.
Under the October US-brokered ceasefire, the heaviest fighting has subsided, though regular Israeli fire continues in Gaza.
The UN World Food Program has noted progress in the enclave but said in its latest food security analysis last week that hunger remains.
"Households reported an average of two meals per day in February 2026, compared to one meal in July," it said.
"Still, one in five households consumed only one meal daily."
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