Hilary Clinton recently left a September 9/11 memorial to cool off at her daughter's home when it was reported that she was overheated in the New York sun.
Clinton, 68, was taken to her daughter Chelsea’s home in Manhattan, and emerged a few hours later wearing sunglasses and telling reporters that she was “feeling great”.
The news of her overheating on the hot, muggy New York morning comes less than 60 days before the Nov. 8 presidential election and at a time of intense campaigning against Republican rival Donald Trump.
Clinton went as previously planned, to her home in Chappaqua, New York, 30 miles (50 km) north of New York City.
Clinton left the memorial event after about 90 minutes while it was still underway, Nick Merrill, a Clinton spokesman said.
“During the ceremony, she felt overheated so departed to go to her daughter’s apartment, and is feeling much better,” Merrill said in a statement.
As the solemn event began on Sunday at the site of the World Trade Center that was attacked by two hijacked airliners 15 years ago, there was patchy sunlight, with temperatures at about 80 degrees Fahrenheit (26.6 Celsius).
But the high humidity caused it to feel much hotter in the crowd at times.
Democratic Representative Joe Crowley of New York, a Clinton supporter who attended the event, told Reuters that it was “incredibly, stiflingly hot” during the ceremony.
After some U.S. media reported she had fallen ill, reporters traveling with the candidate did not get an immediate response from the campaign to questions about her whereabouts and her health.
About 90 minutes elapsed before the campaign issued its statement.