A horse is ridden on a bridge over the swollen River Avon in the aftermath of Storm Christoph, near Chippenham, Britain, January 22, 2021. REUTERS/Toby Melville

Horses are ridden on a bridge over the swollen River Avon in the aftermath of Storm Christoph, near Chippenham, Britain, January 22, 2021. REUTERS/Toby Melville

Boats are anchored outside a submerged shop after the water levels at Lake Naivasha bulged to record high, pushing hundreds of people from surrounding farms around Naivasha town within Nakuru county, Kenya November 8, 2020. Picture taken November 8, 2020. REUTERS/Monicah Mwangi

Residents secure fittings from their submerged houses after the water levels at Lake Naivasha bulged to record high, pushing hundreds of people from surrounding farms around Naivasha town within Nakuru county, Kenya November 8, 2020. Picture taken November 8, 2020. REUTERS/Monicah Mwangi

Residents wade through flood waters after the levels at Lake Naivasha bulged to record high, pushing hundreds of people from surrounding farms around Naivasha town within Nakuru county, Kenya November 8, 2020. Picture taken November 8, 2020. REUTERS/Monicah Mwangi

Residents wade through flood waters near their submerged houses after the water levels at Lake Naivasha bulged to record high, pushing hundreds of people from surrounding farms around Naivasha town within Nakuru county, Kenya November 8, 2020. Picture taken November 8, 2020. REUTERS/Monicah Mwangi

A man attempts to fish from inside a submerged structure after the water levels at Lake Naivasha bulged to record high, pushing hundreds of people from surrounding farms around Naivasha town within Nakuru county, Kenya November 8, 2020. Picture taken November 8, 2020. REUTERS/Monicah Mwangi

Children swim near anchored boats outside a submerged shop after the water levels at Lake Naivasha bulged to record high, pushing hundreds of people from surrounding farms around Naivasha town within Nakuru county, Kenya November 8, 2020. Picture taken November 8, 2020. REUTERS/Monicah Mwangi

Boys are seen on a fallen tree after the water levels at Lake Naivasha bulged to record high, pushing hundreds of people from surrounding farms around Naivasha town within Nakuru county, Kenya November 8, 2020. Picture taken November 8, 2020. REUTERS/Monicah Mwangi

A view shows submerged trees after the water levels at Lake Naivasha bulged to record high, pushing hundreds of people from surrounding farms around Naivasha town within Nakuru county, Kenya November 8, 2020. Picture taken November 8, 2020. REUTERS/Monicah Mwangi

A man walks next to a submerged structure after the water levels at Lake Naivasha bulged to record high, pushing hundreds of people from surrounding farms around Naivasha town within Nakuru county, Kenya November 8, 2020. Picture taken November 8, 2020. REUTERS/Monicah Mwangi

A toilet block is submerged after the water levels at Lake Naivasha bulged to record high, pushing hundreds of people from surrounding farms around Naivasha town within Nakuru county, Kenya November 8, 2020. Picture taken November 8, 2020. REUTERS/Monicah Mwangi

Fishermen paddle their boat near a submerged tree after the water levels at Lake Naivasha bulged to record high, pushing hundreds of people from surrounding farms around Naivasha town within Nakuru county, Kenya November 8, 2020. Picture taken November 8, 2020. REUTERS/Monicah Mwangi

Children swim near anchored boats outside a submerged shop after the water levels at Lake Naivasha bulged to record high, pushing hundreds of people from surrounding farms around Naivasha town within Nakuru county, Kenya November 8, 2020. Picture taken November 8, 2020. REUTERS/Monicah Mwangi

A general view shows submerged trees and structures after the water levels at Lake Naivasha bulged to record high, pushing hundreds of people from surrounding farms around Naivasha town within Nakuru county, Kenya November 8, 2020. Picture taken November 8, 2020. REUTERS/Monicah Mwangi

A child jumps as she wades through flood waters after the levels at Lake Naivasha bulged to record high, pushing hundreds of people from surrounding farms around Naivasha town within Nakuru county, Kenya November 8, 2020. Picture taken November 8, 2020. REUTERS/Monicah Mwangi

Residents secure fittings from their submerged houses after the water levels at Lake Naivasha bulged to record high, pushing hundreds of people from surrounding farms around Naivasha town within Nakuru county, Kenya November 8, 2020. Picture taken November 8, 2020. REUTERS/Monicah Mwangi

A toilet block is submerged after the water levels at Lake Naivasha bulged to record high, pushing hundreds of people from surrounding farms around Naivasha town within Nakuru county, Kenya November 8, 2020. Picture taken November 8, 2020. REUTERS/Monicah Mwangi TPX IMAGES OF THE DAY

Fishermen paddle their boat near a submerged tree after the water levels at Lake Naivasha bulged to record high, pushing hundreds of people from surrounding farms around Naivasha town within Nakuru county, Kenya November 8, 2020. Picture taken November 8, 2020. REUTERS/Monicah Mwangi

A flooded caravan park is seen near the swollen River Severn near Bridgnorth, Britain March 2, 2020. REUTERS/Toby Melville

Additional temporary flood protection barriers are seen placed beside the swollen River Severn to protect properties in Bewdley, Britain March 2, 2020. REUTERS/Toby Melville

Additional temporary flood protection barriers are seen placed beside the swollen River Severn to protect properties in Bewdley, Britain March 2, 2020. REUTERS/Toby Melville

Environment Agency workers monitor the swollen River Severn in Bewdley, Britain March 2, 2020. REUTERS/Toby Melville

A swan swims in floodwater as the River Severn bursts its banks in Bewdley, Britain March 2, 2020. REUTERS/Toby Melville

Additional temporary flood protection barriers are seen placed beside the swollen River Severn to protect properties in Bewdley, Britain March 2, 2020. REUTERS/Toby Melville

An Environment Agency worker looks out from behind temporary additional flood protection barriers placed beside the swollen River Severn in Bewdley, Britain March 2, 2020. REUTERS/Toby Melville

An Environment Agency worker looks out from behind temporary additional flood protection barriers placed beside the swollen River Severn in Bewdley, Britain March 2, 2020. REUTERS/Toby Melville

Additional temporary flood protection barriers are seen placed beside the swollen River Severn to protect properties in Bewdley, Britain March 2, 2020. REUTERS/Toby Melville

Additional temporary flood protection barriers are seen placed beside the swollen River Severn to protect properties at Bewdley, Britain March 2, 2020. REUTERS/Toby Melville

Additional temporary flood protection barriers are seen placed beside the swollen River Severn to protect properties at Bewdley, Britain March 2, 2020. REUTERS/Toby Melville

Additional temporary flood protection barriers are seen placed beside the swollen River Severn to protect properties at Bewdley, Britain March 2, 2020. REUTERS/Toby Melville

A sign warning of increased flooding by a local pressure group is seen beside the swollen River Severn at Bridgnorth, Britain, March 2, 2020. REUTERS/Toby Melville

Walkers view flooding around a public house beside the swollen River Severn at Ironbridge, Britain, March 2, 2020. REUTERS/Toby Melville

Temporary flood protection barriers are seen in place beside the swollen River Severn at Ironbridge, Britain, March 2, 2020. REUTERS/Toby Melville

The flooded rugby ground of Bridgnorth RFC is seen beside the swollen River Severn at Bridgnorth, Britain, March 2, 2020. REUTERS/Toby Melville

Residential properties are partially submerged in flood waters from the swollen River Severn, following Storm Jorge at Upton upon Severn, Britain, March 1, 2020. REUTERS/Toby Melville

Residential properties are partially submerged in flood waters from the swollen River Severn, following Storm Jorge at Upton upon Severn, Britain, March 1, 2020. REUTERS/Toby Melville

A man looks towards the swollen River Severn, following Storm Jorge, as he drinks behind the heightened flood barriers at Upton upon Severn, Britain, March 1, 2020. REUTERS/Toby Melville

Police officers view the swollen River Severn in Ironbridge, Britain, February 27, 2020. REUTERS/Toby Melville

Dorvil Chiloveson, 3, swollen with edema, is watched over by his mother Linda Julien, 20, in the malnutrition ward at St. Damien Pediatric Hospital in Port-au-Prince, Haiti January 29, 2020. Picture taken January 29, 2020. REUTERS/Valerie Baeriswyl

An Indian man, who according to local media was deported from Mexico, shows his feet which were swollen due to an allergy he suffered from walking in forests in Latin America while trying to get to the United Staes, in New Delhi, India, October 18, 2019.REUTERS/Anushree Fadnavis

Debris floating in the rain-swollen Rio Grande, near the location where the bodies of Salvadoran migrant Oscar Alberto Martinez Ramirez and his 23-month old daughter Valeria were found after they drowned, is pictured from the Mexican side of the Brownsville-Matamoros International Bridge at the U.S.-Mexico border in Matamoros, Tamaulipas, Mexico, June 26, 2019. REUTERS/Loren Elliott

Debris floating in the rain-swollen Rio Grande, near the location where the bodies of Salvadoran migrant Oscar Alberto Martinez Ramirez and his 23-month old daughter Valeria were found after they drowned, is pictured from the Mexican side of the Brownsville-Matamoros International Bridge at the U.S.-Mexico border in Matamoros, Tamaulipas, Mexico, June 26, 2019. REUTERS/Loren Elliott

The swollen banks of the Arkansas River is shown in this aerial photo in Fort Smith, Arkansas, U.S., May 30, 2019. REUTERS/ Drone Base

The swollen banks of the Arkansas River is shown in this aerial photo between the cities of Fort Smith and Van Buren, Arkansas, U.S., May 30, 2019. REUTERS/ Drone Base

The swollen Thur River flows past a house in near Thalheim an der Thur, Switzerland May 21, 2019. REUTERS/Arnd Wiegmann

People stand during rainy spring weather on a bridge over the swollen Thur River in near Altikon, Switzerland May 21, 2019. REUTERS/Arnd Wiegmann

People stand during rainy spring weather on a bridge over the swollen Thur River in near Altikon, Switzerland May 21, 2019. REUTERS/Arnd Wiegmann

Divers search a swollen river in Kyrenia, north Cyprus, December 6, 2018. REUTERS/Yiannis Kourtoglou

Divers search a swollen river in Kyrenia, north Cyprus, December 6, 2018. REUTERS/Yiannis Kourtoglou

Divers search a swollen river in Kyrenia, north Cyprus, December 6, 2018. REUTERS/Yiannis Kourtoglou

Divers search a swollen river in Kyrenia, north Cyprus, December 6, 2018. REUTERS/Yiannis Kourtoglou

A swollen red mark from a bee sting is seen on the skin of a patient during therapy by health practitioner Haj Omar Abulhassan at his home in Cairo, Egypt November 10, 2018. Picture taken November 10, 2018. REUTERS/Amr Abdallah Dalsh

A 50 Star Search and Rescue team passes a no trespassing sign while working on the swollen Chipola River following Hurricane Michael in Florida, U.S., October 18, 2018. REUTERS/Brian Snyder SEARCH "SNYDER SAWYER" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

A 50 Star Search and Rescue team passes a sign reading "Slow Watch for Children," knocked over by Hurricane Michael, along the swollen Chipola River in Florida, U.S., October 18, 2018. REUTERS/Brian Snyder SEARCH "SNYDER SAWYER" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Cesar Gouveia, an undocumented Venezuelan migrant, sleeps next to the road in Pamplona, Colombia August 26, 2018. Gouveia, a baker, had swollen feet and was exhausted after a long day of walking through the high Andean mountains. REUTERS/Carlos Garcia Rawlins SEARCH "MIGRANT TACHIRA" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Ryder Moldonado, 5, walks along the swollen banks Cape Fear River in Fayetteville, North Carolina, U.S., September 18, 2018. REUTERS/Patrick Rucker