The International Organization for Migration says thousands of Yemenis are being forced from their homes weekly as instability continues across the country.
Updated Google Maps satellite images, the first since the Israel-Hamas war began nearly three years ago, show wide areas of Gaza reduced to rubble.
A Yemeni minister told Al Jazeera that years of war have strained resources to the point that healthcare may not be able to meet the population's needs in some areas.
Civilians trapped in the flooded, front-line city say supplies have run out entirely, according to accounts relayed to The Guardian.
Three years into the war, many families in Gaza say they have nowhere else to go despite living in structures that may collapse.
Renewed clashes between Houthi and government-aligned forces have driven families from their homes, according to Al Jazeera.
The UN refugee agency says roughly 400 people a day, about 20 times the previous rate, are now crossing from Sudan into eastern Chad.
Daily arrivals have surged past 400 in the past week as fighting and insecurity worsen in Sudan, according to Anadolu Agency, citing the UN refugee agency.
More than 132,000 people have been displaced by recent fighting and Houthi territorial gains, pushing Yemen closer to a renewed full-scale humanitarian emergency.
Surging costs of bread, sugar and meat are straining households already grappling with war and economic instability in Sudan.
A Guardian editorial argues that a "Godzilla-level" El Niño combined with human failures could cause hundreds of thousands of deaths and leave millions hungry, framing the crisis as a matter of injustice as much as weather.
As winter approaches, Gaza residents are calling on the United Nations to pressure Israel to end the war and allow aid deliveries, amid fears of a worsening humanitarian crisis.
The UN Population Fund also found a sharp rise in early and forced marriages amid the ongoing crisis.
A rapid Houthi advance along Yemen's Red Sea coast has raised alarm internationally, with hundreds of civilians killed and more than 100,000 displaced.
Brazilian President Luiz Inacio Lula da Silva condemned the harm inflicted on Gaza by Israel's government, saying its effects will be felt for generations.
The United Nations says the number of people displaced in Yemen under extreme conditions could break records, as fighting between Houthi forces and Saudi-backed loyalist troops kills at least 154 people.
Protests against what is described as migrant 'settlement' have spread to humanitarian facilities, accompanied by attacks and hate speech.
Al-Wafa Hospital warns further suspensions are possible if the fuel and maintenance crisis continues, according to Anadolu Agency.
People in Yemen and aid organizations told NPR that the fighting is displacing families to areas lacking sufficient aid to support them.
The hospital warns the ongoing crisis is depriving thousands of patients of medical treatment on a daily basis.