A worker scrubs a man at a newly-opened traditional Turkish-style steam bath in Sanaa, Yemen February 7, 2019. Picture taken February 7, 2019. REUTERS/Mohamed al-Sayaghi

People take a Turkish bath at a newly-opened traditional Turkish-style steam bath in Sanaa, Yemen February 8, 2019. Picture taken February 8, 2019. REUTERS/Mohamed al-Sayaghi

People sit in a steam room at a newly-opened traditional Turkish-style steam bath in Sanaa, Yemen February 8, 2019. Picture taken February 8, 2019. REUTERS/Mohamed al-Sayaghi

People stretch on the ground of a steam room at a newly-opened traditional Turkish-style steam bath in Sanaa, Yemen February 8, 2019. Picture taken February 8, 2019. REUTERS/Mohamed al-Sayaghi

People have a Turkish bath at a newly-opened traditional Turkish-style steam bath in Sanaa, Yemen February 7, 2019. Picture taken February 7, 2019. REUTERS/Mohamed al-Sayaghi

People have a Turkish bath at a newly-opened traditional Turkish-style steam bath in Sanaa, Yemen February 8, 2019. Picture taken February 8, 2019. REUTERS/Mohamed al-Sayaghi

A worker gives a Turkish massage to a man at a newly-opened traditional Turkish-style steam bath in Sanaa, Yemen February 8, 2019. Picture taken February 8, 2019. REUTERS/Mohamed al-Sayaghi

People have a Turkish bath at a newly-opened traditional Turkish-style steam bath in Sanaa, Yemen February 8, 2019. Picture taken February 8, 2019. REUTERS/Mohamed al-Sayaghi

People have a Turkish bath at a newly-opened traditional Turkish-style steam bath in Sanaa, Yemen February 8, 2019. Picture taken February 8, 2019. REUTERS/Mohamed al-Sayaghi

People have a Turkish bath at a newly-opened traditional Turkish-style steam bath in Sanaa, Yemen February 8, 2019. Picture taken February 8, 2019. REUTERS/Mohamed al-Sayaghi

Wild ducks are seen on the Yenisei river, covered with evaporation frost, with air temperature at about -30 degrees Celsius near Krasnoyarsk, Russia December 4, 2018. REUTERS/Ilya Naymushin TPX IMAGES OF THE DAY

Rugby Union - Premiership - Worcester Warriors vs Bath Rugby - Sixways Stadium, Worcester, Britain - January 5, 2018 A general view of steam during a scrum Action Images/Andrew Boyers

Rugby Union - Premiership - Worcester Warriors vs Bath Rugby - Sixways Stadium, Worcester, Britain - January 5, 2018 General view of a steam cloud after a scrum collapsed Action Images/Andrew Boyers

Rugby Union - European Champions Cup - Bath Rugby vs RC Toulon - Recreation Ground, Bath, Britain - December 16, 2017 Steam rises from a scrum Action Images via Reuters/Andrew Boyers

A patient enters a steam bath at the rehabilitation area at Wat Thamkrabok monastery in Saraburi province, Thailand, February 7, 2017. REUTERS/Jorge Silva SEARCH "TEMPLE SILVA" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Patients prepare to take a steam bath at the rehabilitation and detox area at Wat Thamkrabok monastery in Saraburi province, Thailand, February 8, 2017. REUTERS/Jorge Silva SEARCH "TEMPLE SILVA" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Patients walk to take a steam bath at the rehabilitation and detox area at Wat Thamkrabok monastery in Saraburi province, Thailand, February 8, 2017. REUTERS/Jorge Silva SEARCH "TEMPLE SILVA" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Patients take a cool shower after having a steam bath at the rehabilitation area at Wat Thamkrabok monastery in Saraburi province, Thailand, February 8, 2017. REUTERS/Jorge Silva SEARCH "TEMPLE SILVA" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Turkish-German patient Cengiz steam bathes two days before his ordination as a Buddhist monk, at Wat Thamkrabok monastery in Saraburi province, Thailand, March 28, 2017. REUTERS/Jorge Silva SEARCH "TEMPLE SILVA" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY

A bather relaxes in a steam cabin at the Lukacs Bath in Budapest, Hungary June 28, 2016. REUTERS/Bernadett Szabo SEARCH "BATHS" FOR THIS STORY. SEARCH "THE WIDER IMAGE" FOR ALL STORIES

Customers wait before taking a steam bath at al-Salhiyeh traditional hammam, at a rebel-controlled area in the old city of Aleppo, Syria January 26, 2016. Al-Salhiyeh traditional hammam reopened its door after four years of closure. Picture taken January 26, 2016. REUTERS/Abdalrhman Ismail

Customers eat after taking a steam bath at al-Salhiyeh traditional hammam, at a rebel-controlled area in the old city of Aleppo, Syria January 26, 2016. Al-Salhiyeh traditional hammam reopened its door after four years of closure. Picture taken January 26, 2016. REUTERS/Abdalrhman Ismail

A worker covers a boy with towels after taking a steam bath at al-Salhiyeh traditional hammam, at a rebel-controlled area in the old city of Aleppo, Syria January 26, 2016. Al-Salhiyeh traditional hammam reopened its door after four years of closure. Picture taken January 26, 2016. REUTERS/Abdalrhman Ismail

Free Syrian Army fighters prepare to take a steam bath at al-Salhiyeh traditional hammam, at a rebel-controlled area in the old city of Aleppo, Syria January 26, 2016. Al-Salhiyeh traditional hammam reopened its door after four years of closure. Picture taken January 26, 2016. REUTERS/Abdalrhman Ismail

Free Syrian Army fighters prepare to take a steam bath at al-Salhiyeh traditional hammam, at a rebel-controlled area in the old city of Aleppo, Syria January 26, 2016. Al-Salhiyeh traditional hammam reopened its door after four years of closure. Picture taken January 26, 2016. REUTERS/Abdalrhman Ismail

Customers rest after taking a steam bath at al-Salhiyeh traditional hammam, at a rebel-controlled area in the old city of Aleppo, Syria January 26, 2016. Al-Salhiyeh traditional hammam reopened its door after four years of closure. Picture taken January 26, 2016. REUTERS/Abdalrhman Ismail

Steam rises from the body of a devotee after taking a holy bath in River Saali in Sankhu during the Swasthani Brata Katha festival in Kathmandu, Nepal, January 24, 2016. During the month long festival, devotees recite one chapter of a Hindu tale daily from the 31-chapter sacred Swasthani Brata Katha book that is dedicated to God Madhavnarayan and Goddess Swasthani, alongside various other gods and goddess and the miraculous feats performed by them. The devotees also go on pilgrimages to various temples, perform religious rituals, take a holy bath in the rivers and fast for a month, especially among women who believe fasting helps in their family's well-being or in getting them a good husband. REUTERS/Navesh Chitrakar

A small swimming pool is pictured in the garden of a house opposite of the Tihange nuclear plant of Electrabel, the Belgian unit of French company Engie, former GDF Suez, in Tihange, Belgium, December 29, 2015. REUTERS/Francois Lenoir

A small swimming pool is pictured in the garden of a house opposing Tihange nuclear plant of Electrabel, the Belgian unit of French company Engie, former GDF Suez, in Tihange, Belgium, December 29, 2015. REUTERS/Francois Lenoir

Men relax at a room full of steam before diving into cold water at a traditional steam bath "hammam" in Cairo, September 15, 2014. The "hammam", which was adopted during Turkish rule, is similar to a sauna. Local steam bath culture was recently revived in past years after they were made cleaner, with modern methods of beauty and relaxation introduced. Picture taken September 15, 2014. REUTERS/Asmaa Waguih ? (EGYPT - Tags: SOCIETY)

A worker holds a sign with a woman's image at the entrance of a traditional steam bath "hammam" in Cairo, September 15, 2014. The "hammam", which was adopted during Turkish rule, is similar to a sauna. Local steam bath culture was recently revived in past years after they were made cleaner, with modern methods of beauty and relaxation introduced. Picture taken September 15, 2014. REUTERS/Asmaa Waguih ? (EGYPT - Tags: SOCIETY)

Men relax at a steam room full before diving into cold water at a traditional steam bath "hammam" in Cairo, September 15, 2014. The "hammam", which was adopted during Turkish rule, is similar to a sauna. Local steam bath culture was recently revived in past years after they were made cleaner, with modern methods of beauty and relaxation introduced. Picture taken September 15, 2014. REUTERS/Asmaa Waguih ? (EGYPT - Tags: SOCIETY)

A man waits as a worker scrubs another man with a mud mask at a traditional steam bath "hammam" in Cairo, September 15, 2014. The "hammam", which was adopted during Turkish rule, is similar to a sauna. Local steam bath culture was recently revived in past years after they were made cleaner, with modern methods of beauty and relaxation introduced. Picture taken September 15, 2014. REUTERS/Asmaa Waguih ? (EGYPT - Tags: SOCIETY)

A worker scrubs a man as he's takes a bath at a traditional steam bath "hammam" in Cairo, September 15, 2014. The "hammam", which was adopted during Turkish rule, is similar to a sauna. Local steam bath culture was recently revived in past years after they were made cleaner, with modern methods of beauty and relaxation introduced. Picture taken September 15, 2014. REUTERS/Asmaa Waguih ? (EGYPT - Tags: SOCIETY)

A worker scrubs a man as he takes a bath at a traditional steam bath "hammam" in Cairo, September 15, 2014. The "hammam", which was adopted during Turkish rule, is similar to a sauna. Local steam bath culture was recently revived in past years after they were made cleaner, with modern methods of beauty and relaxation introduced. Picture taken September 15, 2014. REUTERS/Asmaa Waguih ? (EGYPT - Tags: SOCIETY)

Customers wait as a worker scrubs a man taking a bath at a traditional steam bath "hammam" in Cairo, September 15, 2014. The "hammam", which was adopted during Turkish rule, is similar to a sauna. Local steam bath culture was recently revived in past years after they were made cleaner, with modern methods of beauty and relaxation introduced. Picture taken September 15, 2014. REUTERS/Asmaa Waguih ? (EGYPT - Tags: SOCIETY)

A man is cleaned after having a mask applied at a traditional steam bath "hammam" in Cairo, September 15, 2014. The "hammam", which was adopted during Turkish rule, is similar to a sauna. Local steam bath culture was recently revived in past years after they were made cleaner, with modern methods of beauty and relaxation introduced. Picture taken September 15, 2014. REUTERS/Asmaa Waguih ? (EGYPT - Tags: SOCIETY)

A worker scrubs a man as he takes a bath at a traditional steam bath "hammam" in Cairo, September 15, 2014. The "hammam", which was adopted during Turkish rule, is similar to a sauna. Local steam bath culture was recently revived in past years after they were made cleaner, with modern methods of beauty and relaxation introduced. Picture taken September 15, 2014. REUTERS/Asmaa Waguih ? (EGYPT - Tags: SOCIETY)

Mohamed, the younger brother of Mishmish, who runs a traditional popular steam bath "hammam" welcomes customers, in Cairo September 15, 2014. The "hammam", which was adopted during Turkish rule, is similar to a sauna. Local steam bath culture was recently revived in past years after they were made cleaner, with modern methods of beauty and relaxation introduced. Picture taken September 15, 2014. REUTERS/Asmaa Waguih ? (EGYPT - Tags: SOCIETY)

A man receives a face scrub with a mask after a steam bath at a traditional steam bath "hammam" in Cairo, September 15, 2014. The "hammam", which was adopted during Turkish rule, is similar to a sauna. Local steam bath culture was recently revived in past years after they were made cleaner, with modern methods of beauty and relaxation introduced. Picture taken September 15, 2014. REUTERS/Asmaa Waguih ? (EGYPT - Tags: SOCIETY)

A man receives a face scrub with a mask after a steam bath at a traditional steam bath "hammam" in Cairo, September 15, 2014. The "hammam", which was adopted during Turkish rule, is similar to a sauna. Local steam bath culture was recently revived in past years after they were made cleaner, with modern methods of beauty and relaxation introduced. Picture taken September 15, 2014. REUTERS/Asmaa Waguih ? (EGYPT - Tags: SOCIETY)

Men take a dip in a cold bath at a traditional steam bath "hammam" in Cairo, September 15, 2014. The "hammam", which was adopted during Turkish rule, is similar to a sauna. Local steam bath culture was recently revived in past years after they were made cleaner, with modern methods of beauty and relaxation introduced. Picture taken September 15, 2014. REUTERS/Asmaa Waguih ? (EGYPT - Tags: SOCIETY)

A worker rubs a man as he takes a bath at a traditional steam bath "hammam" in Cairo, September 15, 2014. The "hammam", which was adopted during Turkish rule, is similar to a sauna. Local steam bath culture was recently revived in past years after they were made cleaner, with modern methods of beauty and relaxation introduced. Picture taken September 15, 2014. REUTERS/Asmaa Waguih ? (EGYPT - Tags: SOCIETY)

A worker scrubs a man as he takes a bath at a traditional steam bath "hammam" in Cairo, September 15, 2014. The "hammam", which was adopted during Turkish rule, is similar to a sauna. Local steam bath culture was recently revived in past years after they were made cleaner, with modern methods of beauty and relaxation introduced. Picture taken September 15, 2014. REUTERS/Asmaa Waguih ? (EGYPT - Tags: SOCIETY)

Workers scrub people taking a bath at a traditional popular steam bath "hammam" in Cairo, September 15, 2014. The "hammam", which was adopted during Turkish rule, is similar to a sauna. Local steam bath culture was recently revived in past years after they were made cleaner, with modern methods of beauty and relaxation introduced. Picture taken September 15, 2014. REUTERS/Asmaa Waguih ? (EGYPT - Tags: SOCIETY)

Steam rises as a devotee, wearing a necklace, takes a holy bath at River Saali in Sankhu during the first day of Swasthani Brata Katha festival in Kathmandu January 16, 2014. The month-long festival, dedicated to God Madhavnarayan and Goddess Swasthani, involves the recitation of folk tales about miraculous feats performed by them in many Hindu households. REUTERS/Navesh Chitrakar (NEPAL - Tags: RELIGION SOCIETY)

A friend of local resident Valentin Krasin enjoys a traditional leaf massage in his mobile bathing station on the banks of the Tuba river near the village of Kochergino, about 460 km southeast of Russia's Siberian city of Krasnoyarsk, December 1, 2013. Krasin designed and constructed the mobile bathing station based on a traditional Russian banya or steam bath, intending it for trips with friends and possibly as a small commercial venture. Picture taken December 1, 2013. REUTERS/Ilya Naymushin (RUSSIA - Tags: SOCIETY HEALTH)

A friend of local resident Valentin Krasin cools off with cold water after a steam bath in his mobile bathing station on the banks of the Tuba river near the village of Kochergino, about 460 km southeast of Russia's Siberian city of Krasnoyarsk, December 1, 2013. Krasin designed and constructed the mobile bathing station based on a traditional Russian banya or steam bath, intending it for trips with friends and possibly as a small commercial venture. Picture taken December 1, 2013. REUTERS/Ilya Naymushin (RUSSIA - Tags: SOCIETY HEALTH)

A friend of local resident Valentin Krasin cools off with cold water after a steam bath in his mobile bathing station on the banks of the Tuba river near the village of Kochergino, about 460 km southeast of Russia's Siberian city of Krasnoyarsk, December 1, 2013. Krasin designed and constructed the mobile bathing station based on a traditional Russian banya or steam bath, intending it for trips with friends and possibly as a small commercial venture. Picture taken December 1, 2013. REUTERS/Ilya Naymushin (RUSSIA - Tags: SOCIETY HEALTH)

A mobile wooden Russian bath designed and constructed by local resident Valentine Krasin is given a push by his friends in the village of Shoshino, about 455 km southeast of Russia's Siberian city of Krasnoyarsk, December 1, 2013. Krasin designed and constructed the mobile bathing station based on a traditional Russian banya or steam bath, intending it for trips with friends and possibly as a small commercial venture. Picture taken December 1, 2013. REUTERS/Ilya Naymushin (RUSSIA - Tags: SOCIETY HEALTH)

A car pulls a mobile wooden Russian bath designed and constructed by local resident Valentine Krasin in the village of Shoshino, about 455 km southeast of Russia's Siberian city of Krasnoyarsk, December 1, 2013. Krasin designed and constructed the mobile bathing station based on a traditional Russian banya or steam bath, intending it for trips with friends and possibly as a small commercial venture. Picture taken December 1, 2013. REUTERS/Ilya Naymushin (RUSSIA - Tags: SOCIETY HEALTH)

Friends of local resident Valentin Krasin enjoy a traditional leaf massage in his mobile bathing station on the banks of the Tuba river near the village of Kochergino, about 460 km southeast of Russia's Siberian city of Krasnoyarsk, December 1, 2013. Krasin designed and constructed the mobile bathing station based on a traditional Russian banya or steam bath, intending it for trips with friends and possibly as a small commercial venture. Picture taken December 1, 2013. REUTERS/Ilya Naymushin (RUSSIA - Tags: SOCIETY HEALTH)

A friend of local resident Valentin Krasin emerges from a steam bath in his mobile bathing station on the banks of the Tuba river near the village of Kochergino, about 460 km southeast of Russia's Siberian city of Krasnoyarsk, December 1, 2013. Krasin designed and constructed the mobile bathing station based on a traditional Russian banya or steam bath, intending it for trips with friends and possibly as a small commercial venture. Picture taken December 1, 2013. REUTERS/Ilya Naymushin (RUSSIA - Tags: SOCIETY HEALTH)

Local resident Valentine Krasin fetches cold water for his mobile bathing station on the banks of the Tuba river near the village of Kochergino, about 460 km southeast of Russia's Siberian city of Krasnoyarsk, December 1, 2013. Krasin designed and constructed the mobile bathing station based on a traditional Russian banya or steam bath, intending it for trips with friends and possibly as a small commercial venture. Picture taken December 1, 2013. REUTERS/Ilya Naymushin (RUSSIA - Tags: SOCIETY HEALTH)

Valentine Krasin lights the stove of his mobile bathing station on the banks of the Tuba river near the village of Kochergino, about 460 km southeast of Russia's Siberian city of Krasnoyarsk, December 1, 2013. Krasin designed and constructed the mobile bathing station based on a traditional Russian banya or steam bath, intending it for trips with friends and possibly as a small commercial venture. Picture taken December 1, 2013. REUTERS/Ilya Naymushin (RUSSIA - Tags: SOCIETY HEALTH)

Valentine Krasin stands on his home-made mobile wooden Russian banya as he waits for friends in the village of Shoshino, about 455 km southeast of Russia's Siberian city of Krasnoyarsk, December 1, 2013. Krasin designed and constructed the mobile bathing station based on a traditional Russian banya or steam bath, intending it for trips with friends and possibly as a small commercial venture. Picture taken December 1, 2013. REUTERS/Ilya Naymushin (RUSSIA - Tags: SOCIETY HEALTH)

Participants relax after a sauna bath during the European Sauna Marathon in Otepaa, February 10, 2013. More than 600 participants took part in the event by visiting 20 saunas with a total distance of over 100 km (62 miles). Picture taken February 10, 2013. REUTERS/Ints Kalnins (ESTONIA - Tags: SOCIETY TPX IMAGES OF THE DAY)

Children pour cold water on themselves under the control of fitness coach Margarita Filimonova (R) at local kindergarten number 317, with the air temperature at about minus 23 degrees Celsius (minus 9.4 degrees Fahrenheit), in Russia's Siberian city of Krasnoyarsk, February 5, 2013. The program, which also involves sports training, sauna usage and which has been practiced by the kindergarten for 15 years, improves health and keeps children fit. Children start pouring cold water on themselves outdoors after about three years of training and undergoing medical tests, while the kindergarten is the only one in the region which uses these exercises, according to employees. REUTERS/Ilya Naymushin (RUSSIA - Tags: SOCIETY HEALTH TPX IMAGES OF THE DAY)

Men shower in a traditional Turkish bath to prepare for the Eid al-Fitr festival, in Sanaa August 18, 2012. Eid al-Fitr marks the end of Ramadan, the holiest month in the Islamic calendar, and is scheduled to be celebrated in Saudi Arabia and Yemen on August 20, 2012. REUTERS/Mohamed al-Sayaghi (YEMEN - Tags: RELIGION ANNIVERSARY)

Men cool off outside a steam bath in the city of Yaroslavl, some 250 km (155 miles) northeast of Moscow April 1, 2012. REUTERS/Denis Sinyakov (RUSSIA - Tags: SOCIETY)