A girl peers through the iron-sheet fence before entering the Stara Rescue Centre and School during the reopening of schools, for the delayed academic year 2021, amid the novel coronavirus disease (COVID-19) pandemic, in Kibera slums of Nairobi, Kenya on July 26, 2021. (Photo by Thomas Mukoya/Reuters)





A young migrant girl is wrapped in a blanket on the German NGO migrant rescue ship Sea-Watch 3 after being rescued from a wooden boat in the Maltese search and rescue zone in international waters off the coast of Libya, in the western Mediterranean Sea, July 29, 2021. (Photo by Darrin Zammit Lupi/Reuters)





Children play and cool off in a waterfall at the Yards Park as temperatures reached 97 degrees fahrenheit on August 12, 2021 in Washington, DC. A recently released climate report from the United Nations predicts that the world will continue to warm with devastating heat waves, floods and fires becoming more frequent. (Photo by Win McNamee/Getty Images)





Kids play at a selfie station at the Olympic Family & Friends Experience at Universal Orlando on Friday, July 30, 2021. (Photo by Stephen M. Dowell/Orlando Sentinel via AP Photo)





Gauri, 8, reacts inside a parked bus run by TejasAsia, an NGO using “Hope” buses as mobile classrooms for children living in slums, near the Tughlaqabad fort in New Delhi, India on August 9, 2021. (Photo by Anushree Fadnavis/Reuters)





Suzy Ishkontana, 7, poses for a portrait in the house of a family member where she is currently living after her house was destroyed in an airstrike during an 11-day war in Gaza City, Wednesday, June 16, 2021. Suzy's mother, her two brothers and two sisters – ages 9 to 2 – died in the May 16 Israeli attack on the densely packed al-Wahda Street in Gaza City. Israeli authorities say the bombs' target was Hamas tunnels; 42 people died, including 16 women and 10 children. “My kids who died and my wife, they are now in a safe place and there is no worry about them, but my greater fear is for Suzy”, says her father, Riad Ishkontana. (Photo by Felipe Dana/AP Photo)





Children run around amongst pigeons in front of the “Marble Arch Mound” on July 28, 2021 in London, England. The temporary installation next to Marble Arch, designed by architects MVRDV, has drawn criticism with refunds being offered to people who had paid to visit the attraction. (Photo by Dan Kitwood/Getty Images)





A girl takes a skateboard class from the NGO “CDD Skate Arte”, at a public skate park in the City of God favela of Rio de Janeiro, Brazil, Thursday, August 5, 2021. (Photo by Bruna Prado/AP Photo)





Children pour water after a forest fire near in the village of Kastri on Evia (Euboea) island, on August 10, 2021. Nearly 900 firefighters, reinforced overnight with fresh arrivals from abroad, were deployed on the country's second largest island as major towns and resorts remained under threat from a fire that has been burning for eight days. (Photo by Angelos Tzortzinis/AFP Photo)





A child reacts to a throat swab during mass testing for COVID-19 in Wuhan in central China's Hubei province Tuesday, August 3, 2021. The coronavirus’s delta variant is challenging China’s costly strategy of isolating cities, prompting warnings that Chinese leaders who were confident they could keep the virus out of the country need a less disruptive approach. (Photo by Chinatopix via AP Photo)





A boy plays with a toy hot air balloon during the New Jersey Lottery Festival of Ballooning in Readington, New Jersey, U.S., July 24, 2021. (Photo by Hannah Beier/Reuters)





A girl looks at the camera at a shelter for families displaced by gang violence at the Saint Yves Church in Port-au-Prince, Haiti on July 26, 2021. (Photo by Ricardo Arduengo/Reuters)





An Afghan boy receives polio vaccination drops during an anti-polio campaign in Kabul, Afghanistan on March 5, 2006. (Photo by Reuters/Stringer)





After a heavy rain, a girl hauls wood for cooking, in the makeshift settlement Nuevo Queja, Guatemala, Monday, July 5, 2021. The survivors of a mudslide triggered by Hurricane Eta, burying their Guatemalan town Queja in November 2020, were left destitute and displaced in the desperately shabby settlement. (Photo by Rodrigo Abd/AP Photo)





In this file photo taken on Sunday, July 11, 2021, Girl, a migrant from Iraq, looks through a fence at the refugee camp in the village of Verebiejai, some 145km (99,1 miles) south from Vilnius, Lithuania. Lithuanian authorities said Friday that the Baltic country has stemmed the flow of third country migrants illegally crossing from neighboring Belarus, saying the influx of people knocking at the external border of European Union seems to have halted and hundreds have been turned away. (Photo by Mindaugas Kulbis/AP Photo/File)





Twins Dulce Alejandra Mejia, right, and Genesis Mejia, 12, stand for a portrait on the roof of their neighbor's home devastated by hurricanes Eta and Iota in the village of La Reina, Honduras, Saturday, June 26, 2021. Their parents live in Spain. Home to about 1,000 people, the town in western Honduras that was hit by two powerful hurricanes within three weeks, natural disasters made far worse by local deforestation and climate change. (Photo by Rodrigo Abd/AP Photo)





Lucas, 7, left, and his 9-year-old brother Josias, pose for a portrait wearing their feathered costumes during the feast of St. Francis Solano, in Emboscada, Paraguay, Saturday, July 24, 2021. According to their mother they are taking part in the festivities to honor a promise she made to the 16th century Spanish patron saint for their good health amid the new coronavirus pandemic. (Photo by Jorge Saenz/AP Photo)





A teenager selling candy walks past police standing guard outside the National Palace where people rally in support of anti-corruption Prosecutor Juan Francisco Sandoval in Guatemala City, Saturday, July 24, 2021. Sandoval fled Guatemala late Friday, arriving in neighboring El Salvador just hours after he was removed from his post. (Photo by Moises Castillo/AP Photo)





A Palestinian mother washes her son in their house during hot weather in a slum on the outskirts of Khan Younis refugee camp, Gaza Strip, ​04 August 2021. (Photo by Mohammed Saber/EPA/EFE)





Spectators hold signs and cheer for the athletes in the women's marathon in Sapporo Odori Park, Sapporo, Japan on August 7, 2021. (Photo by Feline Lim/Reuters)