More than 16,000 people are now known to have lost their lives to Monday's earthquakes in southern Turkey and northern Syria.
12,873 people had died in Turkey and at least 3,162 in Syria, bringing the total to 16,035.
The death count is expected to rise sharply, by disaster experts as rescue efforts pass the 72-hour mark that is considered the most likely period to save lives.
Rescuers are continuing their painstaking work but hopes are fading for the many still trapped under the rubble.
The sense of loss is spreading more quickly than the search for survivors.
Without shelter, water, fuel or electricity and emergency supplies many survivors could yet lose their lives, according to WHO.