The coalition has been battling the Iran-allied rebels since March 2015, in a war that has killed more than 10,000 people.
"An assault on Hodeidah will unleash shocking brutality on 170,000 children that call the city home, and sever a vital supply line for millions more across", the charity tweeted.
Guards walk on the wreckage of a building destroyed by air strikes in Sanaa, Yemen Thomson Reuters WASHINGTON (Reuters) - The United States on Monday called on clashing factions in Yemen to work with the United Nations to end the more than three-year-old conflict that has pitted Iran-aligned Houthis against other Yemeni forces backed by a Saudi-led coalition.
Residents on the west coast launched a campaign to remove Houthi slogans, he also said, hinting that the Hodeidah Port has become a spot to smuggle weapons to the Houthis.
Assistance provided by King Salman Center for Humanitarian Assistance and Relief Aid (KSRelief) as part of the comprehensive humanitarian operations in Yemen have until Monday benefited 4,791,792 Yemeni citizens, he said. As the last port controlled by the northern rebels, it is the lone source of humanitarian aid for millions across northern Yemen.
UN Secretary General Antonio Guterres said there are "intense negotiations" and his Yemen envoy is involved in shuttle diplomacy to stave off the attack.More news: Tyson Fury: Heavyweight to fight on Carl Frampton undercard in August
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"I hope that there will be a way to avoid the military confrontation in Hodeida", Guterres told reporters.
And while the United Nations continues its diplomatic efforts, they also appear to be preparing to fail, saying they believe an attack by UAE forces on Hodeidah is imminent.
Yemen relies on imports for 90 percent of its food and 70% of those transit through Hodeida, Lowcock said.
The Saudis and UAE believe that seizing Hodeidah will put both military and economic pressure on the Houthis to reenter peace talks, as well as reduce the militants' ability to attack Saudi Arabia.
US Secretary of State Mike Pompeo on Monday expressed concern at the situation in Hudeida and called on all parties to "honour their commitments to working with the United Nations".
The ongoing violence has devastated Yemen's infrastructure, including water and sanitation systems, prompting the United Nations to describe the situation as one of "the worst humanitarian disasters in modern times".