UN special envoy wants to restart talks as humanitarian chief warns that seven million are "on the cusp of famine".
Speaking before the UN Security Council on Wednesday, Ismail Ould Cheikh Ahmed, UN special envoy to Yemen, called on all parties "to act for the sake of peace," saying "excuses are unacceptable...especially when the solutions are in plain sight."
"The opportunity to reach peace is not yet lost," he said, urging the political leaders to recognise that "the continuation of the war can only lead to more human and physical loss". In the same meeting, UN humanitarian chief Stephen O'Brien said the warring parties and their outside backers should feel "deeply guilty" at driving a worsening conflict that has exposed millions of Yemeni civilians "to unfathomable pain and suffering", including seven million people now "on the cusp of famine."
He urged the Security Council to "lean much more heavily and effectively on the parties, and those outside Yemen who are leading this policy and action."
O'Brien said suspected cholera cases have been reported in nearly all the country's districts and at least 1,740 people have already died.
The $2.1bn humanitarian appeal for Yemen is only 33 percent funded, and the response to the cholera epidemic requires an additional $250m, of which just $47m has been received, he said.
"This cholera scandal is entirely man-made by the conflicting parties and those beyond Yemen's borders who are leading, supplying, fighting and perpetuating the fear and fighting," O'Brien said.
On Tuesday, the International Committee of the Red Cross reported that suspected cholera cases now surpassed 300,000.
Yemen has been engulfed in civil war since September 2014, when Houthi rebels swept into the capital of Sanaa and overthrew President Abdd-Rabbu Mansour Hadi's internationally recognised government.
In March 2015, a Saudi-led coalition, which is supporting the Hadi government, began a campaign against Houthi forces allied with ousted President Ali Abdullah Saleh.