Stretched rescue teams are toiling through the night in Turkey and Syria, searching for signs of life in the rubble of thousands of buildings toppled by a catastrophic earthquake.

The death toll rose Wednesday to more than 11,000, making it the deadliest quake worldwide in more than a decade. Hope for finding survivors is fading.

Amid calls for the Turkish government to send more help to the disaster zone, President Recep Tayyip Erdogan toured a “tent city” in Kahramanmaras on Wednesday.

Search teams from more than two dozen countries have joined tens of thousands of local emergency personnel, and aid pledges have poured in from around the world. But the scale of destruction was so immense and spread so wide that many are still waiting for help.