People swim in the sea at a beach in Coney Island of New York City, the United States, July 1, 2020. On Wednesday, eight New York City beaches are officially open for swimming when lifeguards are on duty daily from 10 a.m. to 6 p.m. (Xinhua/Wang Ying)

A lifeguard is seen on duty at a beach in Coney Island of New York City, the United States, July 1, 2020. On Wednesday, eight New York City beaches are officially open for swimming when lifeguards are on duty daily from 10 a.m. to 6 p.m. (Xinhua/Wang Ying)

People walk past a notice board of swimming time at a beach in Coney Island of New York City, the United States, July 1, 2020. On Wednesday, eight New York City beaches are officially open for swimming when lifeguards are on duty daily from 10 a.m. to 6 p.m. (Xinhua/Wang Ying)

Lifeguards are seen on duty at a beach in Coney Island of New York City, the United States, July 1, 2020. On Wednesday, eight New York City beaches are officially open for swimming when lifeguards are on duty daily from 10 a.m. to 6 p.m. (Xinhua/Wang Ying)

A lifeguard walks along a beach in Coney Island of New York City, the United States, July 1, 2020. On Wednesday, eight New York City beaches are officially open for swimming when lifeguards are on duty daily from 10 a.m. to 6 p.m. (Xinhua/Wang Ying)

People swim in the sea at a beach in Coney Island of New York City, the United States, July 1, 2020. On Wednesday, eight New York City beaches are officially open for swimming when lifeguards are on duty daily from 10 a.m. to 6 p.m. (Xinhua/Wang Ying)

People swim in the sea at a beach in Coney Island of New York City, the United States, July 1, 2020. On Wednesday, eight New York City beaches are officially open for swimming when lifeguards are on duty daily from 10 a.m. to 6 p.m. (Xinhua/Wang Ying)