Nearly 23,500 suspected cases of cholera have been registered in war-ravaged Yemen in the past three weeks, the World Health Organization said, as the death toll of the outbreak climbed to at least 242.
"The speed of the resurgence of this cholera epidemic is unprecedented," Nevio Zagaria, WHO country representative for Yemen, told reporters in a conference call on Friday.
Zagaria warned that there could be as many as 250,000 cases in the country within six months.
On Sunday, a state of emergency was declared in Yemen's opposition-held capital, Sanaa, after the outbreak killed scores of people over a two-week period.
The health ministry of the Houthi government announced the measure, saying that "the number of casualties surpassed the normal rates, exceeding the capacity of the health system, which has become unable to contain this unprecedented health and environmental disaster".