People walk in an almost deserted street, hoping for the return of foreign tourists and a busy summer season despite the coronavirus disease (COVID-19), on the glamorous tourist island of Capri, Italy, April 28, 2021. Picture taken April 28, 2021. REUTERS/Yara Nardi 

A woman walks in an almost deserted street, hoping for the return of foreign tourists and a busy summer season despite the coronavirus disease (COVID-19), on the glamorous tourist island of Capri, Italy, April 28, 2021. Picture taken April 28, 2021. REUTERS/Yara Nardi 

A deserted beach is seen the island of Capri, a southern Italian island that relies heavily on foreign tourism, despite the loosening of coronavirus disease (COVID-19) restrictions in much of the country, in Capri, Italy, April 28, 2021. Picture taken April 28, 2021. Picture taken with a drone. REUTERS/Antonio Denti 

A deserted bathhouse is seen in the island of Capri, a southern Italian island that relies heavily on foreign tourism, despite the loosening of coronavirus disease (COVID-19) restrictions in much of the country, in Capri, Italy, April 28, 2021. Picture taken April 28, 2021. Picture taken with a drone. REUTERS/Antonio Denti 

Waiter Orlando Perez shows the area where he normally works with tourists amid the outbreak of the coronavirus disease (COVID-19), at the Santa Maria beach in Havana, Cuba, April 1, 2021. REUTERS/Alexandre Meneghini 

A view of a nearly deserted beach amid concerns about the spread of the coronavirus disease (COVID-19) in Varadero, Cuba, October 23, 2020. Picture taken October 23, 2020. REUTERS/Alexandre Meneghini/Pool 

A view of a nearly deserted beach amid concerns about the spread of the coronavirus disease (COVID-19) in Varadero, Cuba, October 23, 2020. Picture taken October 23, 2020. REUTERS/Alexandre Meneghini/Pool 

A view of a nearly deserted beach amid concerns about the spread of the coronavirus disease (COVID-19) in Varadero, Cuba, October 23, 2020. Picture taken October 23, 2020. REUTERS/Alexandre Meneghini/Pool 

A general view of Taghaghien Island Resort in Egypt's Western Desert, during the activation of domestic tourism after the government cancelled the celebration of the Siyaha peace festival, or the 'Peace festival' amid concerns over the coronavirus disease (COVID-19) pandemic, in Siwa Oasis, Egypt October 16, 2020. Picture taken October 16, 2020. REUTERS/Amr Abdallah Dalsh 

Egyptians enjoy the sunset on an island around salty lakes in Egypt's Western Desert, during the activation of domestic tourism after the government cancelled the celebration of the Siyaha peace festival, or the 'Peace festival' amid concerns over the coronavirus disease (COVID-19) pandemic, in Siwa Oasis, west of the Egyptian capital, Egypt October 16, 2020. Picture taken October 16, 2020. REUTERS/Amr Abdallah Dalsh 

Egyptians enjoy the sunset on an island around salty lakes in Egypt's Western Desert, during the activation of domestic tourism after the government cancelled the celebration of the Siyaha peace festival, or the 'Peace festival', amid concerns over the coronavirus disease (COVID-19) pandemic, in Siwa Oasis, west of the Egyptian capital, Egypt October 16, 2020. Picture taken October 16, 2020. REUTERS/Amr Abdallah Dalsh 

Egyptians enjoy the sunset on an island around salty lakes in Egypt's Western Desert, during the activation of domestic tourism after the government cancelled the celebration of the Siyaha peace festival, or the 'Peace festival', amid concerns over the coronavirus disease (COVID-19) pandemic, in Siwa Oasis, west of the Egyptian capital, Egypt October 16, 2020. Picture taken October 16, 2020. REUTERS/Amr Abdallah Dalsh 

An Egyptian man swims in a lake in front of Taghaghien Island Resort in Egypt's Western Desert, during the activation of domestic tourism after the government cancelled the celebration of the Siyaha peace festival, or the 'Peace festival', amid concerns over the coronavirus disease (COVID-19) pandemic, in Siwa Oasis, west of the Egyptian capital, Egypt October 16, 2020. Picture taken October 16, 2020. REUTERS/Amr Abdallah Dalsh TPX IMAGES OF THE DAY 

A view of Havana's harbour as dust carried by winds from the Sahara desert shrouds the city, Cuba June 25, 2020. REUTERS/Alexandre Meneghini 

A view of Havana as dust carried by winds from the Sahara desert shrouds the city, Cuba June 25, 2020. REUTERS/Alexandre Meneghini 

Security officer stand at the colonial-era fortress "El Morro Cabana" as dust carried by winds from the Sahara desert shrouds Havana, Cuba, June 24, 2020. REUTERS/Alexandre Meneghini 

Photographers shoot pictures at the colonial-era fortress "El Morro Cabana" as dust carried by winds from the Sahara desert shrouds Havana, Cuba, June 24, 2020. REUTERS/Alexandre Meneghini 

A fishing boat leaves the bay of Havana as dust carried by winds from the Sahara desert shrouds the city in Cuba, June 24, 2020. REUTERS/Alexandre Meneghini 

Shakira Maldonado, 23, photographs her classmate Angeliveth Rodriguez, 22, that graduated from Social Work at the Interamerican University as a sand storm from the region of the Sahara Desert sweeps over San Juan, Puerto Rico June 23, 2020. REUTERS/Gabriella N. Baez 

Shakira Maldonado, 23, photographs her classmate Angeliveth Rodriguez, 22, that graduated from Social Work at the Interamerican University as a sand storm from the region of the Sahara Desert sweeps over San Juan, Puerto Rico June 23, 2020. REUTERS/Gabriella N. Baez 

Isla Verde beach as a sand storm from the region of the Sahara Desert sweeps over San Juan, Puerto Rico June 23, 2020. REUTERS/Gabriella N. Baez 

The San Juan docks as a sand storm from the region of the Sahara Desert sweeps over San Juan, Puerto Rico June 23, 2020. REUTERS/Gabriella N. Baez 

Best Buy in Hato Rey as a sand storm from the region of the Sahara Desert sweeps over San Juan, Puerto Rico June 23, 2020. REUTERS/Gabriella N. Baez 

The Bay of San Juan as a sand storm from the region of the Sahara Desert sweeps over San Juan, Puerto Rico June 23, 2020. REUTERS/Gabriella N. Baez 

Luis Munoz Marin International Airport as a sand storm from the region of the Sahara Desert sweeps over San Juan, Puerto Rico June 23, 2020. REUTERS/Gabriella N. Baez 

Isla Verde beach as a sand storm from the region of the Sahara Desert sweeps over San Juan, Puerto Rico June 23, 2020. REUTERS/Gabriella N. Baez 

A deserted beach where large numbers of tourists used to come is seen, after an island-wide daytime curfew has been lifted to restart the country's economic activities following an almost two-months of lockdown amid concerns about the spread of the coronavirus disease (COVID-19), in Colombo, Sri Lanka June 4, 2020. REUTERS/Dinuka Liyanawatte 

A view of a deserted road amid concerns about the spread of the coronavirus disease (COVID-19), in Varadero, Cuba, April 10, 2020. Picture taken April 10, 2020. REUTERS/Alexandre Meneghini 

An abandoned homestead in a corn field near Keyes, Oklahoma in the state's panhandle region which has yet to report a single case of coronavirus, in Guymon, U.S., March 26, 2020. Picture taken March 26, 2020. REUTERS/Andrew Hay 

A deserted street leading to St. John's Co-Cathedral is seen after Malta imposed a 14-day quarantine on all arrivals on the island in a bid to stop the spread of coronavirus, in Valletta Malta March 13, 2020. REUTERS/Darrin Zammit Lupi 

Salim Maatoug, 26, the president of Nuevas Olas surf club, holds a photo taken in 2008 of himself and a friend posing in front of The Armas Essalama, a cruise ship that connected Puerto Rosario (Canary Islands) to Tarfaya, in Tarfaya, Morocco, April 13, 2021. "We have a deal here. Everyone who leaves Tarfaya has to come back and do something for the town," said Maatoug. REUTERS/Imane Djamil SEARCH "DJAMIL SURFERS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES 

A damaged model human skeleton is seen in the aftermath of Hurricane Dorian on the Great Abaco island town of Marsh Harbour, Bahamas, September 3, 2019. Picture taken September 3, 2019.REUTERS/Dante Carrer 

A deserted yacht marina before the arrival of Hurricane Dorian on the Great Abaco island town of Marsh Harbour, Bahamas, August 31, 2019. REUTERS/Dante Carrer 

A deserted yacht marina before the arrival of Hurricane Dorian on the Great Abaco island town of Marsh Harbour, Bahamas, August 31, 2019. REUTERS/Dante Carrer 

A deserted yacht marina before the arrival of Hurricane Dorian on the Great Abaco island town of Marsh Harbour, Bahamas, August 31, 2019. REUTERS/Dante Carrer 

A deserted yacht marina before the arrival of Hurricane Dorian on the Great Abaco island town of Marsh Harbour, Bahamas, August 31, 2019. REUTERS/Dante Carrer 

An aerial view of the Caspian Sea near the city of Baku is pictured through the window of Turkish Airlines airplane, ahead of Europa League Final, in Baku Azerbaijan May 27, 2019. REUTERS/Amr Abdallah Dalsh 

An aerial view of the Caspian Sea near the city of Baku is pictured through the window of Turkish Airlines airplane, ahead of Europa League Final, in Baku Azerbaijan May 27, 2019. REUTERS/Amr Abdallah Dalsh 

An aerial view of the Caspian Sea near the city of Baku is pictured through the window of Turkish Airlines airplane, ahead of Europa League Final, in Baku Azerbaijan May 27, 2019. REUTERS/Amr Abdallah Dalsh 

A rosary is pictured at St. Anthony's Shrine, days after a string of suicide bomb attacks on churches and luxury hotels across the island on Easter Sunday, in Colombo, Sri Lanka April 26, 2019. REUTERS/Thomas Peter 

Boats are moored on the beach on Ghoramara Island, India, September, 20, 2018. Picture taken on September 20, 2018. REUTERS/Rupak De Chowdhuri 

An abandoned house is seen on Ghoramara Island, India, September 21, 2018. Picture taken on September 21, 2018. REUTERS/Rupak De Chowdhuri 

Salt crystals on seen on a broom's brush at the salt pans at Xwejni, outside the village of Zebbug on the island of Gozo, Malta September 4, 2018. Picture taken September 4, 2018. REUTERS/Darrin Zammit Lupi 

The harvested salt is seen in a mound in a salt pan at Xwejni, outside the village of Zebbug on the island of Gozo, Malta September 4, 2018. Picture taken September 4, 2018. REUTERS/Darrin Zammit Lupi 

A pile of salt is seen in a salt pan at Xwejni, outside the village of Zebbug on the island of Gozo, Malta September 4, 2018. Picture taken September 4, 2018. REUTERS/Darrin Zammit Lupi 

Salt flakes are seen in a salt pan at Xwejni, outside the village of Zebbug on the island of Gozo, Malta September 4, 2018. Picture taken September 4, 2018. REUTERS/Darrin Zammit Lupi 

A pile of salt is seen in a salt pan at Xwejni, outside the village of Zebbug on the island of Gozo, Malta September 4, 2018. Picture taken September 4, 2018. REUTERS/Darrin Zammit Lupi 

A destroyed small boat is seen along the shoreline as strong winds and rough seas batter the coast of the Maltese islands, in St Paul's Bay, Malta September 26, 2018. REUTERS/Darrin Zammit Lupi 

Destroyed small boats are seen along the shoreline as strong winds and rough seas batter the coast of the Maltese islands, in St Paul's Bay, Malta September 26, 2018. REUTERS/Darrin Zammit Lupi 

Destroyed small boats are seen along the shoreline as strong winds and rough seas batter the coast of the Maltese islands, in St Paul's Bay, Malta September 26, 2018. REUTERS/Darrin Zammit Lupi 

A sponge is seen at the bottom of the Adriatic sea of the island Mljet, Croatia, May 30, 2018. Picture taken May 30, 2018. REUTERS/Antonio Bronic 

A ball for volleyball is seen at the bottom of Adriatic sea of the island Mljet, Croatia, May 30, 2018. Picture taken May 30, 2018. REUTERS/Antonio Bronic 

A plastic bottle is seen floating in an Adriatic sea of the island Mljet, Croatia, May 30, 2018. Picture taken May 30, 2018. REUTERS/Antonio Bronic 

A wheel is seen at the bottom of the Adriatic sea off the island of Ugljan, Croatia, May 19, 2018. Picture taken May 19, 2018. REUTERS/Antonio Bronic 

A boot is seen at the bottom of the Adriatic sea of the island Mljet, Croatia, May 29, 2018. Picture taken May 29, 2018. REUTERS/Antonio Bronic 

A plastic bottle is seen floating in an Adriatic sea of the island Mljet, Croatia, May 30, 2018. Picture taken May 30, 2018. REUTERS/Antonio Bronic 

A boot is seen at the bottom of the Adriatic sea of the island Mljet, Croatia, May 29, 2018. Picture taken May 29, 2018. REUTERS/Antonio Bronic 

A ball for volleyball is seen at the bottom of Adriatic sea of the island Mljet, Croatia, May 30, 2018. Picture taken May 30, 2018. REUTERS/Antonio Bronic 

A sponge is seen at the bottom of the Adriatic sea of the island Mljet, Croatia, May 30, 2018. Picture taken May 30, 2018. REUTERS/Antonio Bronic 

A wheel is seen at the bottom of the Adriatic sea off the island of Ugljan, Croatia, May 19, 2018. Picture taken May 19, 2018. REUTERS/Antonio Bronic