The Australian doctor Nada Abu Alrub, who works as a volunteer at Shifa hospital in Gaza city, describes the situation as "a nightmare".
The hospital is half in ruins after almost two years of war, many beds lack mattresses and medicine is a constant shortage.
It is a mass murder, says Abu Alrub to BBC, about the offensive.
Saved fetus
The stream of patients is endless. The doctors are forced to operate on very severely injured with "minimal to almost no" anesthesia.
No pain relief either. It is terrible.
Last week, a woman was brought in who died from her injuries. She was highly pregnant. With an emergency cesarean section, the doctors managed to save the baby's life, says Abu Alrub.
Outside, the Israeli ground offensive is getting closer. Videos on social media show Israeli tanks just 500 meters from the hospital, reports BBC.
Blast and gunshot wounds
Hundreds of thousands of people have already fled Gaza city, which increases the pressure on the hospitals in the south.
Every day we see more people from the north with blast and gunshot wounds, with old, dirty and infected wounds, says the British doctor Martin Griffiths, who arrived in southern Gaza two weeks ago, to The Guardian.
The emergency department at the hospital he works at has 90 beds. Just during one single night, they recently received 160 patients, says Griffiths. The same night, another 600 people sought care at the hospital's other, smaller clinic.
We see a tsunami coming towards us, with more and more injuries and less and less equipment to treat them.