In the night, a huge blaze destroyed the overcrowded Moria facility, which is home to 12,800 migrants. According to Greek media, it could have been arson. The fire broke out after reports emerged that 35 residents of the camp had been diagnosed with COVID-19.
The emergency meeting, chaired by Mitsotakis, is scheduled for 9:30 a.m. (6:30 GMT).
The ministers of citizen protection, health, migration policy and asylum, as well as chiefs of intelligence service and national defense general staff, are in attendance.
Meanwhile, Doctors Without Borders (MSF) said on Wednesday that the Moria migrant camp on the Greek island of Lesbos has been burnt to the ground, leaving some 12,000 residents, including children, without shelter.
The MSF is working to address the crisis, he added.