All passengers were evacuated safely after belly-landing of the plane, which was flying from Nagpur to Hyderabad, according to the Mumbai airport.
The incident took place around 9.30 pm on Saturday in the flat located on the seventh floor of a building in Badlapur township.
Thackeray made the announcement about free vaccines after chairing a cabinet meeting.
A high-level enquiry committee has been constituted to go into the cause of the fire.
District Disaster Control Cell chief Vivekanand Kadam told PTI that the fire was preceded by an explosion in the AC unit of the intensive care unit.
The new restrictions under the government's 'Break-the-Chain' program will come into effect from Thursday 8 pm and will remain effective till 7 am on May 1.
The curfew, which excludes essential services, will come into effect from 8 pm in Maharashtra on Wednesday. Chief Minister Uddhav Thackeray refrained from terming the new curbs as a lockdown.
Maharashtra CM Uddhav Thackeray had indicated the imposition of a strict lockdown
The apex court dismissed pleas of Maharashtra government and its former home minister Anil Deshmukh challenging CBI probe into graft allegations against the latter.
The suspended assistant police inspector, an accused in the explosives case and the subsequent death of businessman Mansukh Hiran, is currently in the NIA custody.