Political pressures and changing weather could hamper the humanitarian efforts.
The official said injuries and fatalities linked to severe earthquakes often rise “significantly” in the week after the disaster.
Here is an ongoing list of countries dispatching aid, personnel and equipment to help rescue efforts after a quake killed thousands in the region.
Dramatic video from Turkey & Syria shows the moments two deadly earthquakes hit & the race against time to rescue survivors trapped in the rubble.
The U.S. pledged to provide “any and all” assistance needed as rescue efforts began.
Authorities feared the death toll would keep climbing as rescuers looked for survivors among tangles of metal and concrete spread across the region.
"It's not normal, no matter what they tell you!" the Fox News host declared.
Thousands gathered to denounce the verdict against the popular Mayor Ekrem Imamoglu, who is a member of the main opposition party.
Police arrested a Syrian woman suspected of links to militants who Turkey accuses of bombing a bustling pedestrian avenue in Istanbul that killed six.
Turkish President Recep Tayyip Erdogan called the blast a “treacherous attack” and said its perpetrators would be punished.