Israel-Gaza updates: Gaza sees deadliest day since conflict began

The dueling resolutions on the Israel-Hamas war put forth to the United Nations Security Council by Russia and the U.S. have both failed.

Russia's version called for a humanitarian ceasefire and avoided condemning Hamas. Russia, China, the UAE and Gabon voted in favor of the draft, while nine members abstained, and both the U.S. and the U.K. voted against it.

While the U.S. emphasized in its resolution Israel’s right to defend itself from Hamas, officials worked to find a middle ground that would placate a majority of members, urging a pause to military action in Gaza. The U.S. measure secured the votes it needed to advance out of the council but was ultimately vetoed by Russia and China.

"The United States is deeply disappointed that Russia and China vetoed this resolution. A resolution that, as I've said, was strong and it was balanced. That was the product of consultations with members of this Council. We did listen to all of you. We incorporated feedback. And we worked to forge consensus around a resolution that would send a clear message to the world – and most importantly, to Israelis and Palestinians – that this Council is determined to meet this moment," U.S. Ambassador to the U.N. Linda Thomas-Greenfield said.

-ABC News' Shannon Crawford

The World Health Organization said there's "an urgent need" for Hamas to "provide signs of life, proof of provision of health care and the immediate release" of the hostages.

WHO Director-General Dr. Tedros Adhanom Ghebreyesus said he met with families of some hostages on Wednesday.

"Many of the hostages, including children, women and the elderly, have pre-existing health conditions requiring urgent and sustained care and treatment," he said in a statement. "The mental health trauma that the abducted, and the families, are facing is acute and psychosocial support is of great importance."

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3 different families detail their ordeal of having relatives taking hostage by Hamas

Nearly three weeks after the attack by Hamas, families aren’t giving up hope that their relatives will be released from captivity.

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Maj. Gen. (res.) Giora Eiland, the former head of the Israel National Security Council, told ABC News the "definitions of defeating Hamas … have to be a little more measurable and realistic."

Eiland, who has been working inside Israel’s military headquarters, said there’s no way to completely destroy Hamas, but he said what Israel can do "is destroy the military capabilities and other governmental functions of Hamas."

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What is Hamas?

Hamas is an Islamic political and militant organization that controls the Gaza Strip.

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"But even to achieve this limited goal we will have to maintain the military effort," he said.

Eiland said Israel cannot allow Hamas "the ability now or in the future to rebuild their rocket arsenal."

-ABC News' Matt Gutman

The House on Wednesday is debating a resolution to show support for Israel and condemn Hamas.

The resolution introduced by House Foreign Affairs Chairman Mike McCaul is entitled "Standing with Israel as it defends itself against the barbaric war launched by Hamas and other terrorists."

It's expected to pass with large bipartisan support.

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How to help victims of the Israel-Gaza conflict

More than 2,600 people, including civilians and hundreds of children, have been killed and nearly 9,000 injured in Israel and Gaza since the war broke out on Saturday.

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-ABC News' Lauren Peller