In a rare move, Secretary-General António Guterres has invoked Article 99 of the UN charter over the unfolding tragedy in Gaza.
https://thehill.com/policy/international/4345665-un-chief-guterres-article-99-gaza-crisis/
In a letter to José Javier De la Gasca Lopez Domínguez, the current U.N. Security Council president, Guterres said he expects “public order to completely break down due to desperate conditions, rendering even limited humanitarian assistance impossible.”
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If I understand correctly (I'm no expert), this would set a call for a humanitarian cease fire in motion in the Security Council, and force the US to veto it if they want to allow Israel to continue the fighting.