FILE - Tourists visit the 5th century BC Propylaea on the Acropolis Hill during a hot day in Athens, Greece, May 28, 2026.(AP Photo/Petros Giannakouris, File)

FILE - A person uses a mini electric fan as they wait on a subway platform during a heat advisory in New York, May 19, 2026. (AP Photo/Adam Gray, File)

FILE - A faithful protects from the hot sun before Pope Leo XIV's weekly general audience in St. Peter's Square at The Vatican, May 27, 2026. (AP Photo/Alessandra Tarantino, File)

FILE - A woman cools herself outside the Palace of Westminster in London, May 26, 2026. (AP Photo/Kin Cheung, File)

Britain's Kate, Princess of Wales, at the wedding of Harriet Sperling to Peter Phillips at All Saints Church in Kemble, Gloucestershire, England, Saturday, June 6, 2026. (Ben Birchall/PA via AP)

Britain's King Charles III arriving for the wedding of Harriet Sperling to Peter Phillips at All Saints Church in Kemble, England, Saturday June 6, 2026. (Ben Birchall/PA via AP)

Britain's King Charles III arriving for the wedding of Harriet Sperling to Peter Phillips at All Saints Church in Kemble, England, Saturday June 6, 2026. (Ben Birchall/PA via AP)

Bride Harriet Sperling and bride groom Peter Phillips, accompanied by bridesmaids after their wedding ceremony at All Saints Church in Kemble, Gloucestershire, England, Saturday, June 6, 2026. (Ben Birchall/PA via AP)