UN aid operations chief John Ging on Tuesday said living conditions in Yemen are "catastrophic" following three years of conflict.
Ging said Yemen, considered the world's worst humanitarian crisis, faces a growing risk of famine and cholera.
More than one million people have been infected with cholera since April 2017, the UN official noted, adding that diphtheria was on the rise for the first time since 1982.
Read more: Yemen: Between conflict and collapse
On top of the public health crisis, more than 22 million people need food assistance, including 8.4 million who are on the verge of severe hunger, according to UN figures.
"People's lives have continued unraveling," said Ging. "Conflict has escalated since November driving an estimated 100,000 people from their homes."
'More poverty and destruction'
"The parties have continued the destructive pattern of zero-sum politics which has led the country to plunge into more poverty and destruction," said Cheikh Ahmed.
More than 15,000 people have been killed and thousands more have been injured since 2015, when Saudi Arabia launched a military offensive against the Houthis and their allies aimed at supporting the internationally recognized government of Yemeni President Abed Rabbo Mansour Hadi.
Human rights group have accused both sides of atrocities, including targeting combatants in civilian areas.
"For nearly three years, Yemen's warring parties have committed war crimes with little fear that other governments will hold them to account," said Sarah Leah Whitson, Middle East director at Human Rights Watch, last month.
ls/aw (AP, AFP)