As the death toll in Turkey and Syria neared 25,000, daunting challenges loomed to care for hundreds of thousands of homeless people amid the wreckage.
Martin Griffiths, the United Nations humanitarian chief, said he was on his way to visit parts of Turkey and Syria affected by an earthquake that has killed more than 20,000 people.
One of the hardest hit areas was northwestern Syria, where nearly three million people displaced by the country’s decade-long civil war were already living in precarious conditions.