First Chief of the Tribal Eagle Village Karma Ulvi greets a sled dog team led by Steve Robbins, who crossed a frozen lake to help with vaccinations, in Eagle, Alaska, U.S., March 31, 2021. Picture taken March 31, 2021. REUTERS/Nathan Howard

Steve Robbins leads his sled dog team across a frozen lake after helping at a vaccination site in Eagle, Alaska, U.S., March 31, 2021. Picture taken March 31, 2021. REUTERS/Nathan Howard

Steve Robbins leads his sled dog team across a frozen lake after helping at a vaccination site in Eagle, Alaska, U.S., March 31, 2021. Picture taken with a drone on March 31, 2021. REUTERS/Nathan Howard

A participant steers his yacht on the ice of frozen Lake Baikal during the Baikal ice sailing cup in Irkutsk Region, Russia March 23, 2021. Picture taken March 23, 2021. REUTERS/Yuri Novikov

A participant steers his yacht on the ice of frozen Lake Baikal during the Baikal ice sailing cup in Irkutsk Region, Russia March 23, 2021. Picture taken March 23, 2021. Picture taken with a drone. REUTERS/Yuri Novikov

Participants compete on the ice of frozen Lake Baikal during the Baikal ice sailing cup in Irkutsk Region, Russia March 23, 2021. Picture taken March 23, 2021. REUTERS/Yuri Novikov

A participant stands next to a yacht on the ice of frozen Lake Baikal during the Baikal ice sailing cup in Irkutsk Region, Russia March 23, 2021. Picture taken March 23, 2021. REUTERS/Yuri Novikov

A participant steers his yacht on the ice of frozen Lake Baikal during the Baikal ice sailing cup in Irkutsk Region, Russia March 23, 2021. Picture taken March 23, 2021. REUTERS/Yuri Novikov TPX IMAGES OF THE DAY

Children play next to yachts on the ice of frozen Lake Baikal during the Baikal ice sailing cup in Irkutsk Region, Russia March 23, 2021. Picture taken March 23, 2021. REUTERS/Yuri Novikov

Participants compete on the ice of frozen Lake Baikal during the Baikal ice sailing cup in Irkutsk Region, Russia March 23, 2021. Picture taken March 23, 2021. REUTERS/Yuri Novikov

A participant sits by a yacht on the ice of frozen Lake Baikal during the Baikal ice sailing cup in Irkutsk Region, Russia March 23, 2021. Picture taken March 23, 2021. REUTERS/Yuri Novikov

Participants compete on the ice of frozen Lake Baikal during the Baikal ice sailing cup in Irkutsk Region, Russia March 23, 2021. Picture taken March 23, 2021. REUTERS/Yuri Novikov

Participants compete on the ice of frozen Lake Baikal during the Baikal ice sailing cup in Irkutsk Region, Russia March 23, 2021. Picture taken March 23, 2021. Picture taken with a drone. REUTERS/Yuri Novikov

Participants compete on the ice of frozen Lake Baikal during the Baikal ice sailing cup in Irkutsk Region, Russia March 23, 2021. Picture taken March 23, 2021. REUTERS/Yuri Novikov

Participants compete on the ice of frozen Lake Baikal during the Baikal ice sailing cup in Irkutsk Region, Russia March 23, 2021. Picture taken March 23, 2021. REUTERS/Yuri?Novikov

The Exeter City football team get back on the bus to start their 330 mile trip back home as the football match between Barrow and Exeter City was postponed at Holker Street, during the coronavirus disease (COVID-19) outbreak, in Barrow-in-Furness, Britain, February 9, 2021. The match was postponed due to a frozen pitch. The referee called it off 30 minutes before the game was meant to start. REUTERS/Carl Recine SEARCH "RECINE FANS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

People walk with a dog on the frozen Lake Baikal in the village of Bolshoye Goloustnoye in Irkutsk region, Russia March 8, 2021. REUTERS/Maxim Shemetov

Children play hockey on the frozen Lake Baikal in the village of Bolshoye Goloustnoye in Irkutsk region, Russia March 8, 2021. REUTERS/Maxim Shemetov

Ilya Chudesa, a partisipant of Baikal Mile 2021 festival of speed held on the ice of frozen Lake Baikal, drives to the festival site near the village of Maksimikha in the Republic of Buryatia, Russia March 5, 2021. Picture taken March 5, 2021. REUTERS/Maxim Shemetov

Participants ride their vehicles at sunset time on the ice of frozen Lake Baikal during Baikal Mile 2021 festival of speed near the village of Maksimikha in the Republic of Buryatia, Russia March 6, 2021. Picture taken March 6, 2021. REUTERS/Maxim Shemetov

Ilya Chudesa, a participant of Baikal Mile 2021 festival of speed, prepares for the ride on the ice of frozen Lake Baikal near the village of Maksimikha in the Republic of Buryatia, Russia March 6, 2021. Picture taken March 6, 2021. REUTERS/Maxim Shemetov

Participants ride their vehicles at sunset time on the ice of frozen Lake Baikal during Baikal Mile 2021 festival of speed near the village of Maksimikha in the Republic of Buryatia, Russia March 6, 2021. Picture taken March 6, 2021. REUTERS/Maxim Shemetov

A car drives on the ice of frozen Lake Baikal during Baikal Mile 2021 festival of speed near the village of Maksimikha in the Republic of Buryatia, Russia March 6, 2021. Picture taken March 6, 2021. Picture taken with a drone. REUTERS/Maxim Shemetov

A participant lights a torch during Baikal Mile 2021 festival of speed on the ice of frozen Lake Baikal near the village of Maksimikha in the Republic of Buryatia, Russia March 6, 2021. Picture taken March 6, 2021. REUTERS/Maxim Shemetov

Participants ride their vehicles at sunset time on the ice of frozen Lake Baikal during Baikal Mile 2021 festival of speed near the village of Maksimikha in the Republic of Buryatia, Russia March 6, 2021. Picture taken March 6, 2021. REUTERS/Maxim Shemetov

Women take a selfie with a participant of Baikal Mile 2021 festival of speed on the ice of frozen Lake Baikal near the village of Maksimikha in the Republic of Buryatia, Russia March 6, 2021. Picture taken March 6, 2021. REUTERS/Maxim Shemetov

Ilya Bolotskikh, a participant of Baikal Mile 2021 festival of speed, prepares for the ride on the ice of frozen Lake Baikal near the village of Maksimikha in the Republic of Buryatia, Russia March 6, 2021. Picture taken March 6, 2021. REUTERS/Maxim Shemetov

Participants ride their vehicles at sunset time on the ice of frozen Lake Baikal during Baikal Mile 2021 festival of speed near the village of Maksimikha in the Republic of Buryatia, Russia March 6, 2021. Picture taken March 6, 2021. REUTERS/Maxim Shemetov

Dancers dressed in traditional clothes pose during Baikal Mile 2021 festival of speed on the ice of frozen Lake Baikal near the village of Maksimikha in the Republic of Buryatia, Russia March 6, 2021. Picture taken March 6, 2021. REUTERS/Maxim Shemetov

Cars of participants are seen on the ice of frozen Lake Baikal during Baikal Mile 2021 festival of speed near the village of Maksimikha in the Republic of Buryatia, Russia March 6, 2021. Picture taken March 6, 2021. REUTERS/Maxim Shemetov

Head of the Republic of Buryatia Alexey Tsydenov looks on during Baikal Mile 2021 festival of speed on the ice of frozen Lake Baikal near the village of Maksimikha, Russia March 6, 2021. Picture taken March 6, 2021. REUTERS/Maxim Shemetov

A participant drives his bike on the ice of frozen Lake Baikal during Baikal Mile 2021 festival of speed near the village of Maksimikha in the Republic of Buryatia, Russia March 6, 2021. Picture taken March 6, 2021. REUTERS/Maxim Shemetov

A man dressed in traditional clothes smiles during Baikal Mile 2021 festival of speed on the ice of frozen Lake Baikal near the village of Maksimikha in the Republic of Buryatia, Russia March 6, 2021. Picture taken March 6, 2021. REUTERS/Maxim Shemetov

Ilya Chudesa, a participant of Baikal Mile 2021 festival of speed, prepares for the ride on the ice of frozen Lake Baikal near the village of Maksimikha in the Republic of Buryatia, Russia March 6, 2021. Picture taken March 6, 2021. REUTERS/Maxim Shemetov

Georgy Medvedev, a participant of Baikal Mile 2021 festival of speed, stands on the roof of a limousine on the ice of frozen Lake Baikal near the village of Maksimikha in the Republic of Buryatia, Russia March 6, 2021. Picture taken March 6, 2021. REUTERS/Maxim Shemetov

A woman walks past the 'Monk', a sculpture from 2014 by British artist Damien Hirst, on the frozen Lake St. Moritz, as the spread of the coronavirus disease (COVID-19) continues in the Alpine resort of St. Moritz, Switzerland February 26, 2021. REUTERS/Arnd Wiegmann

Frozen Lake Silvaplanasee and Lake Silsersee are seen while Sahara dust makes the sky misty at the Corviglia ski area, as the spread of the coronavirus disease (COVID-19) continues, near the Alpine resort of St. Moritz, Switzerland February 23, 2021. REUTERS/Arnd Wiegmann

Empty shelves are seen at frozen food section in Fiesta supermarket after winter weather caused food and clean water shortage in Houston, Texas, U.S. February 19, 2021. REUTERS/Go Nakamura

A visitor stands near the partially frozen Uchan-Su waterfall outside Yalta, Crimea February 17, 2021. REUTERS/Alexey Pavlishak

People pose for selfies in front of the partially frozen Uchan-Su waterfall near Yalta, Crimea February 17, 2021. REUTERS/Alexey Pavlishak

A view shows the partially frozen Uchan-Su waterfall near Yalta, Crimea February 17, 2021. REUTERS/Alexey Pavlishak TPX IMAGES OF THE DAY

People fish on the frozen Dnipro river in Kyiv, Ukraine February 15, 2021. REUTERS/Valentyn Ogirenko

People fish on the frozen Dnipro river in Kyiv, Ukraine February 15, 2021. REUTERS/Valentyn Ogirenko TPX IMAGES OF THE DAY

People fish on the frozen Dnipro river in Kyiv, Ukraine February 15, 2021. Picture taken with a drone. REUTERS/Valentyn Ogirenko

People fish on the frozen Dnipro river in Kyiv, Ukraine February 15, 2021. REUTERS/Valentyn Ogirenko

Two boys play ice hockey on a frozen pond at the Zoo Zurich public park during sunny winter weather, as the spread of the coronavirus disease (COVID-19) continues, in Zurich, Switzerland February 15, 2021. REUTERS/Arnd Wiegmann TPX IMAGES OF THE DAY

People enjoy the sunny day on the frozen river spree at Rummelsburger Bay in Berlin, Germany, February 14, 2021. REUTERS/Annegret Hilse

People enjoy the sunny day on the frozen river spree at Rummelsburger Bay in Berlin, Germany, February 14, 2021. REUTERS/Annegret Hilse

People enjoy the sunny day on the frozen river spree at Rummelsburger Bay in Berlin, Germany, February 14, 2021. REUTERS/Annegret Hilse

The sun sets on a frozen Mississippi River during cold weather in Alton, Illinois, U.S. February 12, 2021. REUTERS/Lawrence Bryant

The Alton Bridge is seen in the background of a frozen Mississippi River during cold weather in Alton, Illinois , U.S. February 12, 2021. REUTERS/Lawrence Bryant

A barge plows through a frozen Mississippi River during cold weather in Alton, Illinois , U.S. February 12, 2021. REUTERS/Lawrence Bryant

A man takes a photo of a frozen waterfall during cold weather in St Louis, Missouri, U.S. February 12, 2021. REUTERS/Lawrence Bryant TPX IMAGES OF THE DAY

People take pictures at the shore of the partially frozen Baltic sea in Svetlogorsk, Kaliningrad Region, Russia February 12, 2021. REUTERS/Vitaly Nevar

A woman walks along the shore of the partially frozen Baltic sea in Zelenogradsk, Kaliningrad Region, Russia February 12, 2021. REUTERS/Vitaly Nevar

People stand at the shore of the partially frozen Baltic sea in Pionersky, Kaliningrad Region, Russia February 12, 2021. REUTERS/Vitaly Nevar

Birds fly over the partially frozen Baltic sea in Zelenogradsk, Kaliningrad Region, Russia February 12, 2021. REUTERS/Vitaly Nevar

A view shows a pier at the shore of the partially frozen Baltic sea in Pionersky, Kaliningrad Region, Russia February 12, 2021. REUTERS/Vitaly Nevar

A man stands at the shore of the partially frozen Baltic sea in Zelenogradsk, Kaliningrad Region, Russia February 12, 2021. REUTERS/Vitaly Nevar

A crow and a seagull fly over a partially frozen pond at the Moscow Zoo during snowfall in Moscow, Russia February 12, 2021. REUTERS/Maxim Shemetov