Gas deliveries to Bulgaria are yet to resume, but the warm weather front approaching the country could bring some relief in the coming days. Temperatures are expected to venture into positive territory throughout most of the country by the week's end, although nights will remain crisp, forecasters have said.

After hitting -7°C on January 12, highs in Sofia could reach up to 3-4°C on January 13, according to the national meteorology institute at the Bulgarian Academy of Sciences. Throughout the country, temperatures are expected to rise as high as -1°C to 4°C.

As the warm front pushes further into Bulgaria, isolated snow and rain showers are expected on January 14-15, with highs of up to 5-10°C, while in parts of southern Bulgaria temperatures could climb up to 12-13°C.

Relief will be short-lived, however, with the cold snap returning at the weekend, when temperatures will "drop significantly" and more snow showers are expected, the meteorology institute said.

Bulgarian meteorologists lack the equipment to forecast weather beyond a three-day period, but commercial weather services AccuWeather and Weather Channel did not expect drastic cold snaps in Sofia over the weekend and the start of next week.