The level of hunger is really what’s heartbreaking,' and it's getting worse, said a Texas surgeon visiting Gaza for the third time.

The drums of war are pounding on the doorstep of Gaza City. Residents of the largest city in northern Gaza, packed with locals and refugees, fear the hours are ticking down before a looming Israeli offensive.

Soon after arriving at a Gaza City hospital, Texas surgeon Mohammed Adeel Khaleel examined a 17-year-old with gunshot wounds sustained when he went to an aid site.

Representative Greene has grown increasingly vocal about the humanitarian crisis in Gaza as famine spreads in the enclave.

Israeli Defense Minister Israel Katz warned that Gaza city could "turn into Rafah and Beit Hanoun" unless Hamas agrees to Israel's terms.

"An entire population is being pushed into starvation, destitution, and death,” said Belgium's Deputy Prime Minister.

A UN-backed body confirms famine in Gaza City and surrounding areas, and says half a million are facing "catastrophic" conditions.