Puppy Paw Balm. An Extra Shirt. New Yorkers Cope With Hazardous Heat.

Weeks of scorching temperatures across North America, Europe, Asia and other parts of the world have put July on track to be Earth’s warmest month on record, the European Union climate monitor said on Thursday. Last month, the planet experienced its hottest June since records began in 1850, and July 6 was its hottest day.

Inside a Starbucks store in Manhattan, Linda Habashi, 54, who was visiting from Marin County, Calif., was reading the temperature out loud off her phone with growing foreboding. Temperatures in excess of 100 degrees have become routine where she is from, she said, but New York’s one-two punch of heat and humidity was worse.

“It’s sticky, hot, and you just get shiny and sticky from doing nothing,” she said as she took in the coffee shop’s manufactured chill. It wouldn’t stop her visit, she added, saying, “You just got to keep going. You live it, like everything else in this world.”

At Dramatics, a hair salon on Broadway, Marcello Costa, 40, shared some advice that he has been telling customers as they come in from the heat: Think twice about asking for short hair cuts, or risk buyer’s remorse when the temperature levels out.

“Never go for a haircut when it’s this hot, it’s same concept as never go to a supermarket when you’re hungry,” said Mr. Costa, who lives in Astoria, Queens. “You’ll end up being influenced by what you’re feeling in the moment — and you might regret it.”

Reporting was contributed by Ed Shanahan, Andy Newman and Sharon Otterman.