Tornadoes have been forecast for the Black Sea region, a day after a storm that left more than two million people without electricity in Russia and Ukraine.

A think tank said the weather also affected Russian military operations.

The storm killed at least 14 people in Russia and Ukraine, officials said, as it toppled trees, tore down power lines and flooded coastal areas.

President Volodymyr Zelenskyy said at least five people died in the Odesa region of southern Ukraine, and that engineers were working to restore electricity to villages that have been cut off.

Russia Crimea Storm
Russian Emergency Ministry rescuers arrive to evacuate people after flooding near Evpatoria in annexed Crimea (Russian Emergency Ministry Press Service via AP)

On Tuesday morning, almost 100,000 people were still without power on the Crimean Peninsula and some still had no water supply, the Russia-installed governor said, announcing that several regions were still under a state of emergency.

Crimea, which was annexed from Ukraine by Russia in 2014, is a key military and logistics hub for Russia as it pursues its war in Ukraine.

The damage caused by the storm affected “the tempo of military operations along the frontline in Ukraine” but has not stopped military activity entirely, the Institute for the Study of War (ISW) said.

The Washington-based think tank reported that the storm forced Russia to return all of its naval vessels and missile carriers to their bases, and suggested that the threat of mines drifting in the Black Sea will increase because the storm has dispersed minefields.

There were also reports that the storm damaged railways in coastal areas which could have an impact on the Russian military’s logistics capabilities in occupied Crimea and southern Ukraine, the ISW said.

Winds of 67 mph were forecast for Tuesday in Crimea, southern Russia and parts of north-western Russia, the state news agency Tass reported.

In the Vologda region, about 310 miles north east of Moscow, more than 10 days worth of snow — about 25cm (10in) — fell in one day, Tass said, citing the mayor of a small town who said road clearing took twice as long as usual.

The storm also caused the Moscow region to be blanketed with snow on Monday, piling drifts up to 25cm deep, three times heavier than normal, the Tass news agency said.

It was part of a weather system that created blizzard-like conditions in Romania, Moldova, Bulgaria and Serbia on Sunday, dumping snow and causing power outages and fatal traffic crashes.