A rooftop garden is seen at Union Rescue Mission homeless shelter, amid the coronavirus disease (COVID-19) outbreak, in Los Angeles, California, U.S., September 16, 2020. REUTERS/Lucy Nicholson

Municipal candidate and Alexei Navalny ally in Tomsk Andrei Fateev poses for a portrait on the rooftop of an office building in Tomsk, Russia September 12, 2020. Picture taken September 12, 2020. REUTERS/Maxim Shemetov

Municipal candidate and Alexei Navalny ally in Tomsk Andrei Fateev enters the office from the rooftop in Tomsk, Russia September 12, 2020. Picture taken September 12, 2020. REUTERS/Maxim Shemetov

Municipal candidate and Alexei Navalny ally in Tomsk Andrei Fateev uses his mobile phone on the rooftop of an office building in Tomsk, Russia September 12, 2020. Picture taken September 12, 2020. REUTERS/Maxim Shemetov

A woman takes photos on the new rooftop terrace as she attends The Metropolitan Museum of Art on their first day open since closing due to the coronavirus disease (COVID-19) outbreak in the Manhattan borough of New York City, New York, U.S., August 27, 2020. REUTERS/Carlo Allegri

A woman takes a selfie on the new rooftop terrace as she attends The Metropolitan Museum of Art on their first day open since closing due to the coronavirus disease (COVID-19) outbreak in the Manhattan borough of New York City, New York, U.S., August 27, 2020. REUTERS/Carlo Allegri

A woman talks on her phone on the new rooftop terrace as she attends The Metropolitan Museum of Art on their first day open since closing due to the coronavirus disease (COVID-19) outbreak in the Manhattan borough of New York City, New York, U.S., August 27, 2020. REUTERS/Carlo Allegri

A woman checks her phone on the new rooftop terrace as she attends The Metropolitan Museum of Art on their first day open since closing due to the coronavirus disease (COVID-19) outbreak in the Manhattan borough of New York City, New York, U.S., August 27, 2020. REUTERS/Carlo Allegri

A woman takes a selfie on the new rooftop terrace as she attends The Metropolitan Museum of Art on their first day open since closing due to the coronavirus disease (COVID-19) outbreak in the Manhattan borough of New York City, New York, U.S., August 27, 2020. REUTERS/Carlo Allegri

People walk past a sign asking for social distancing on the new rooftop terrace at The Metropolitan Museum of Art on their first day open since closing due to the coronavirus disease (COVID-19) outbreak in the Manhattan borough of New York City, New York, U.S., August 27, 2020. REUTERS/Carlo Allegri

Acrobats perform during a performance of the fairytale "The Shepherdess and the Chimney Sweep" by Hans Christian Andersen over Prague's rooftops, Czech Republic, August 25, 2020. REUTERS/David W Cerny

Acrobats perform during a performance of the fairytale "The Shepherdess and the Chimney Sweep" by Hans Christian Andersen over Prague's rooftops, Czech Republic, August 25, 2020. REUTERS/David W Cerny TPX IMAGES OF THE DAY

Acrobats perform during a performance of the fairytale "The Shepherdess and the Chimney Sweep" by Hans Christian Andersen over Prague's rooftops, Czech Republic, August 25, 2020. REUTERS/David W Cerny

Acrobats perform during a performance of the fairytale "The Shepherdess and the Chimney Sweep" by Hans Christian Andersen over Prague's rooftops, Czech Republic, August 25, 2020. REUTERS/David W Cerny

An acrobat performs during a performance of the fairytale "The Shepherdess and the Chimney Sweep" by Hans Christian Andersen over Prague's rooftops, Czech Republic, August 25, 2020. REUTERS/David W Cerny

An acrobat performs during a performance of the fairytale "The Shepherdess and the Chimney Sweep" by Hans Christian Andersen over Prague's rooftops, Czech Republic, August 25, 2020. REUTERS/David W Cerny

Acrobats perform during a performance of the fairytale "The Shepherdess and the Chimney Sweep" by Hans Christian Andersen over Prague's rooftops, Czech Republic, August 25, 2020. REUTERS/David W Cerny

An acrobat performs during a performance of the fairytale "The Shepherdess and the Chimney Sweep" by Hans Christian Andersen over Prague's rooftops, Czech Republic, August 25, 2020. REUTERS/David W Cerny

An acrobat performs during a performance of the fairytale "The Shepherdess and the Chimney Sweep" by Hans Christian Andersen over Prague's rooftops, Czech Republic, August 25, 2020. REUTERS/David W Cerny

An acrobat performs during a performance of the fairytale "The Shepherdess and the Chimney Sweep" by Hans Christian Andersen over Prague's rooftops, Czech Republic, August 25, 2020. REUTERS/David W Cerny

People watch a movie during a screening on a rooftop of a shopping mall on the opening night of the 10th Beijing International Film Festival that has been scaled down and largely moved online due to the outbreak of the coronavirus disease (COVID-19), in Beijing China August 22, 2020. REUTERS/Thomas Peter

People watch a movie during a screening on a rooftop of a shopping mall on the opening night of the 10th Beijing International Film Festival that has been scaled down and largely moved online due to the outbreak of the coronavirus disease (COVID-19), in Beijing China August 22, 2020. REUTERS/Thomas Peter

People watch a movie during a screening on a rooftop of a shopping mall on the opening night of the 10th Beijing International Film Festival that has been scaled down and largely moved online due to the outbreak of the coronavirus disease (COVID-19), in Beijing China August 22, 2020. REUTERS/Thomas Peter

People watch a movie during a screening on a rooftop of a shopping mall on the opening night of the 10th Beijing International Film Festival that has been scaled down and largely moved online due to the outbreak of the coronavirus disease (COVID-19), in Beijing China August 22, 2020. REUTERS/Thomas Peter

People watch a movie during a screening on a rooftop of a shopping mall on the opening night of the 10th Beijing International Film Festival that has been scaled down and largely moved online due to the outbreak of the coronavirus disease (COVID-19), in Beijing China August 22, 2020. REUTERS/Thomas Peter

Justin Ratowsky of music group Cali Conscious performs on a rooftop for guests staying at the Pasea hotel during the outbreak of the coronavirus disease (COVID-19), in Huntington Beach, California, U.S., August 21, 2020. REUTERS/Mario Anzuoni

Music group Cali Conscious performs on a rooftop for guests staying at the Pasea hotel during the outbreak of the coronavirus disease (COVID-19), in Huntington Beach, California, U.S., August 21, 2020. REUTERS/Mario Anzuoni

Music group Cali Conscious performs on a rooftop for guests staying at the Pasea hotel during the outbreak of the coronavirus disease (COVID-19), in Huntington Beach, California, U.S., August 21, 2020. REUTERS/Mario Anzuoni

Music group Cali Conscious performs on a rooftop for guests staying at the Pasea hotel during the outbreak of the coronavirus disease (COVID-19), in Huntington Beach, California, U.S., August 21, 2020. REUTERS/Mario Anzuoni

Music group Cali Conscious performs on a rooftop for guests staying at the Pasea hotel during the outbreak of the coronavirus disease (COVID-19), in Huntington Beach, California, U.S., August 21, 2020. REUTERS/Mario Anzuoni

Music group Cali Conscious performs on a rooftop for guests staying at the Pasea hotel during the outbreak of the coronavirus disease (COVID-19), in Huntington Beach, California, U.S., August 21, 2020. REUTERS/Mario Anzuoni

Music group Cali Conscious performs on a rooftop for guests staying at the Pasea hotel during the outbreak of the coronavirus disease (COVID-19), in Huntington Beach, California, U.S., August 21, 2020. REUTERS/Mario Anzuoni

Music group Cali Conscious performs on a rooftop for guests staying at the Pasea hotel during the outbreak of the coronavirus disease (COVID-19), in Huntington Beach, California, U.S., August 21, 2020. REUTERS/Mario Anzuoni

Personal protective equipment (PPE) gear used by employees at a hotel for sanitising rooms, is left out to dry on a rooftop, during the coronavirus disease (COVID-19) outbreak, in Bhagalpur, Bihar, India, July 27, 2020. REUTERS/Danish Siddiqui SEARCH "BHAGALPUR HOSPITAL COVID-19" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Maintenance workers clean various chimney areas along the rooftop of the White House, amid the coronavirus disease (COVID-19) outbreak in Washington, U.S., August 11, 2020. REUTERS/Tom Brenner

Guests watch a screening of "Mad Max: Fury Road" to benefit the Charlize Theron Africa Outreach Project at a rooftop drive-in during the outbreak of the coronavirus disease (COVID-19), in Los Angeles, California, U.S., July 31, 2020. REUTERS/Mario Anzuoni

Guests watch a screening of "Mad Max: Fury Road" to benefit the Charlize Theron Africa Outreach Project at a rooftop drive-in during the outbreak of the coronavirus disease (COVID-19), in Los Angeles, California, U.S., July 31, 2020. REUTERS/Mario Anzuoni

Guests watch a screening of "Mad Max: Fury Road" to benefit the Charlize Theron Africa Outreach Project at a rooftop drive-in during the outbreak of the coronavirus disease (COVID-19), in Los Angeles, California, U.S., July 31, 2020. REUTERS/Mario Anzuoni

Guests watch a screening of "Mad Max: Fury Road" to benefit the Charlize Theron Africa Outreach Project at a rooftop drive-in during the outbreak of the coronavirus disease (COVID-19), in Los Angeles, California, U.S., July 31, 2020. REUTERS/Mario Anzuoni

Cast member Charlize Theron attends a screening of "Mad Max: Fury Road" to benefit the Charlize Theron Africa Outreach Project at a rooftop drive-in during the outbreak of the coronavirus disease (COVID-19), in Los Angeles, California, U.S., July 31, 2020. REUTERS/Mario Anzuoni

Cast member Charlize Theron attends a screening of "Mad Max: Fury Road" to benefit the Charlize Theron Africa Outreach Project at a rooftop drive-in during the outbreak of the coronavirus disease (COVID-19), in Los Angeles, California, U.S., July 31, 2020. REUTERS/Mario Anzuoni TPX IMAGES OF THE DAY

Cast member Charlize Theron gestures next to co-star Nicholas Hoult and host Aisha Tyler at a screening of "Mad Max: Fury Road" to benefit the Charlize Theron Africa Outreach Project at a rooftop drive-in during the outbreak of the coronavirus disease (COVID-19), in Los Angeles, California, U.S., July 31, 2020. REUTERS/Mario Anzuoni

Cast member Charlize Theron attends a screening of "Mad Max: Fury Road" to benefit the Charlize Theron Africa Outreach Project at a rooftop drive-in during the outbreak of the coronavirus disease (COVID-19), in Los Angeles, California, U.S., July 31, 2020. REUTERS/Mario Anzuoni

Cast members Charlize Theron and Nicholas Hoult attend a screening of "Mad Max: Fury Road" to benefit the Charlize Theron Africa Outreach Project at a rooftop drive-in during the outbreak of the coronavirus disease (COVID-19), in Los Angeles, California, U.S., July 31, 2020. REUTERS/Mario Anzuoni

Guests watch a screening of "Mad Max: Fury Road" to benefit the Charlize Theron Africa Outreach Project at a rooftop drive-in during the outbreak of the coronavirus disease (COVID-19), in Los Angeles, California, U.S., July 31, 2020. REUTERS/Mario Anzuoni

Cast member Charlize Theron arrives for a screening of "Mad Max: Fury Road" to benefit the Charlize Theron Africa Outreach Project at a rooftop drive-in during the outbreak of the coronavirus disease (COVID-19), in Los Angeles, California, U.S., July 31, 2020. REUTERS/Mario Anzuoni

Cast member Nicholas Hoult attends a screening of "Mad Max: Fury Road" to benefit the Charlize Theron Africa Outreach Project at a rooftop drive-in during the outbreak of the coronavirus disease (COVID-19), in Los Angeles, California, U.S., July 31, 2020. REUTERS/Mario Anzuoni

Cast members Charlize Theron and Nicholas Hoult attend a screening of "Mad Max: Fury Road" to benefit the Charlize Theron Africa Outreach Project at a rooftop drive-in during the outbreak of the coronavirus disease (COVID-19), in Los Angeles, California, U.S., July 31, 2020. REUTERS/Mario Anzuoni

Cast member Charlize Theron attends a screening of "Mad Max: Fury Road" to benefit the Charlize Theron Africa Outreach Project at a rooftop drive-in during the outbreak of the coronavirus disease (COVID-19), in Los Angeles, California, U.S., July 31, 2020. REUTERS/Mario Anzuoni

Cast member Charlize Theron attends a screening of "Mad Max: Fury Road" to benefit the Charlize Theron Africa Outreach Project at a rooftop drive-in during the outbreak of the coronavirus disease (COVID-19), in Los Angeles, California, U.S., July 31, 2020. REUTERS/Mario Anzuoni

Cast member Charlize Theron attends a screening of "Mad Max: Fury Road" to benefit the Charlize Theron Africa Outreach Project, at a rooftop drive-in during the outbreak of the coronavirus disease (COVID-19), in Los Angeles, California, U.S., July 31, 2020. REUTERS/Mario Anzuoni

Inmates protest on the rooftop of the San Sebastian prison, to demand government medical assistance, amid the coronavirus disease (COVID-19) outbreak, in Cochabamba, Bolivia, July 27, 2020. The sign reads "Courts, do work. Freedom". REUTERS/Danilo Balderrama

Inmates protest on the rooftop of the San Sebastian prison, to demand government medical assistance, amid the coronavirus disease (COVID-19) outbreak, in Cochabamba, Bolivia, July 27, 2020. REUTERS/Danilo Balderrama

Inmates protest on the rooftop of the San Sebastian prison, to demand government medical assistance, amid the coronavirus disease (COVID-19) outbreak, in Cochabamba, Bolivia, July 27, 2020. REUTERS/Danilo Balderrama

Inmates protest on the rooftop of the San Sebastian prison, to demand government medical assistance, amid the coronavirus disease (COVID-19) outbreak, in Cochabamba, Bolivia, July 27, 2020. REUTERS/Danilo Balderrama TPX IMAGES OF THE DAY

Inmates protest on the rooftop of the San Sebastian prison, to demand government medical assistance, amid the coronavirus disease (COVID-19) outbreak, in Cochabamba, Bolivia, July 27, 2020. REUTERS/Danilo Balderrama

Inmates protest on the rooftop of the San Sebastian prison, to demand government medical assistance, amid the coronavirus disease (COVID-19) outbreak, in Cochabamba, Bolivia, July 27, 2020. The sign reads: "We want pardon". REUTERS/Danilo Balderrama

Inmates protest on the rooftop of the San Sebastian prison, to demand government medical assistance, amid the coronavirus disease (COVID-19) outbreak, in Cochabamba, Bolivia, July 27, 2020. The sign reads: "We want pardon". REUTERS/Danilo Balderrama

Inmates protest on the rooftop of the San Sebastian prison, to demand government medical assistance, amid the coronavirus disease (COVID-19) outbreak, in Cochabamba, Bolivia, July 27, 2020. REUTERS/Danilo Balderrama

Inmates protest on the rooftop of the San Sebastian prison, to demand government medical assistance, amid the coronavirus disease (COVID-19) outbreak, in Cochabamba, Bolivia, July 27, 2020. The sign reads: "The rich have private doctors. The prisoners - no doctors, no medicines". REUTERS/Danilo Balderrama