The UK will donate an additional £2 million to provide mattresses, blankets, cooking equipment and other essentials for almost 8,000 families caught up in the conflict in Gaza.
The funds will be added to the United Nations Relief and Works Agency's Gaza flash appeal and brings Britain's contribution to Gaza aid to £15 million in the past two weeks.
International Development Secretary Justine Greening said: "The UK is responding to the immediate needs of the people of Gaza whose everyday life is now intolerable. UK aid is getting water, food and shelter to families who are suffering and getting hospitals back up and running so they can treat the injured."
She added that an "immediate and unconditional" ceasefire respected by all sides in the conflict was now essential.
There have been two days of quiet in Gaza. No rockets or missiles, no more destroyed houses, no more ambulance sirens screaming.
A three-year-old girl has been rescued from Gaza and brought to London for life-saving heart surgery.
A small team of NHS doctors and surgeons is travel to Gaza to set up facilities and establish how best to use specialists and equipment.