The condition of the heating systems in Burgas remains critical but is expected to be fixed real soon, said Atanas Saikov, chief executive of the “Crisis management” department of the Ministry of economics and energetics. During the day, the heating systems in Pleven, Razgrad and Burgas will switch to mazut (heavy, low quality fuel oil).

All heating systems across Bulgaria that switched to mazut should start increasing their heating capacity within 24 hours, added Saikov.

Of all five heating plants in Sofia, four have already switched to mazut. The “Sofia-East” plant will be the last to switch, due to technical difficulties. The installations there have not worked with mazut for over 15 years, and the process of switching the fuel will be longer.