The Disasters Emergency Committee (DEC) said it has launched a Gaza crisis appeal as "400,000 people have fled their homes and urgently need food, water and medical aid."
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.