“The needs are massive and way beyond the capacity of aid organizations currently on the ground," the Associated Press quoted the head of Doctors Without Borders Gazali Babiker as saying in Jordan on Monday.
The international community's response to the crisis has not been sufficient, he added.
The group, also known as Medecins Sans Frontieres (MSF), says it has treated over 10,000 people in Yemen since March, 5,000 of whom underwent surgery.
Some hospitals in the Yemeni southern port city of Aden “had to close their doors" as they were so overwhelmed, said regional MSF project co-coordinator Thierry Goffeau.
Goffeau noted that he has worked in many places over the past few years, but the situation in Yemen was "by far" the worst.
Since March 26, Riyadh has been pounding various areas in Yemen – without a UN mandate. The military aggression is meant to undermine Houthi fighters and restore power to Yemen’s fugitive former President Abd Rabbuh Mansur Hadi, a staunch ally of the Riyadh regime.
Meanwhile, in a recent Saudi attack on its impoverished neighbor, a woman and a child were killed in the Harad district of the northwestern Hajjah province.
Raids were also carried out in the northern province of Jawf and the southwestern Ibb and Bayda provinces.
The Yemeni army, backed by Popular Committees, carried out retaliatory attacks on Saudi positions.
According to Yemen’s al-Masirah TV, dozens of Saudi soldiers were killed by shelling in the Qwwah camp in the southwestern Najran region.
The Yemeni army also targeted military equipment in another camp in Najran.