Russia's weather center said that temperatures would remain well below minus 20 Celsius for at least another five days.
Moscow emergency services said seven people died overnight from exposure in the capital and some 22 were being treated in hospital.
This winter is the coldest in Moscow since the one of 1978-1979, when temperatures fell to minus 38 Celsius in the capital.
Officials say more than 120 people have died from cold in Moscow since the end of October.
The cold spell has raised fears of blackouts as demand for electricity soared to record highs.
(Reuters)
