It is produced at the request of the U.N. Security Council.
More than 8,300 people have been killed and 44,000 wounded since the Saudi-led coalition entered the Yemen war in 2015.
The United Nations has worked to avert attacks on Hodeidah port, where around 80 percent of Yemen's food imports arrive.
A Saudi military force has been deployed to Yemen's southern city of Aden to secure a number of strategic sites in the city, which now serves as the interim headquarters of Yemen's internationally recognized government, Anadolu Agency reports. The Houthi movement denies the allegations.
"Death looms for Yemenis by air, land and sea", Special Envoy of the Secretary-General to Yemen, Ismail Ould Cheikh Ahmed told the 15-member Council in NY.
"In 2017, the number of air strikes per month is three times higher than previous year, and monthly reports of armed clashes are up by more than 50 percent", he said.
While the report does not specify who is behind the air raids, the Saudi-led Arab military coalition allied with the government largely controls Yemen's airspace.
Every day spent without serious action means more destruction and death, he said, as well as the spread of terrorist groups - such as the Al Qaeda in the Arabian Peninsula - and "uncontrolled migration" through the Gulf of Aden to Yemen, where more than 41 migrants died in early August after being forced to abandon their boats and jump.
The humanitarian official urged the global community to ensure that all ports are open to civilian, including to commercial traffic. Sanaa and Hodeidah best serve the north, not Aden.
The World Health Organisation (WHO) has said that the number of suspected cholera cases in Yemen has reached half a million, while the death toll has exceeded 2,000.
He also stressed the need for civil servants to be paid "to prevent the collapse of institutions and for accountability to be strengthened".
But he said the United Nations will continue working with Yemenis "to mainstream the language of peace and reach a political solution".
He said Egypt, Iran, Oman, Saudi Arabia, the United Arab Emirates, the Gulf Cooperation Council and the Arab League all supported his proposals and that he was hoping to meet with the Houthis outside of Yemen to discuss the possible deal.