LONDON — Britain was thrown into meteorological confusion Tuesday after temperatures reached 35 degrees Celsius, a temperature Thai people traditionally describe as “the walk from 7-Eleven to the motorbike.”

The reading, recorded at London’s Kew Gardens and Heathrow Airport, broke a century-old spring temperature record for the second time in 24 hours, according to Britain’s Met Office. The previous record had stood since 1922 and 1944, when people were presumably too polite to complain directly to the sun.

Across the U.K., residents responded to the heat wave with the calm, measured dignity for which Britain is internationally famous: removing shirts in public parks, panic-buying ice creams, and describing the weather as “absolutely unbearable” while standing in direct sunlight wearing black jeans.

For residents of Thailand, however, the news prompted confusion.

“Thirty-five degrees? That’s not a heat wave,” said one Bangkok resident. “That’s the temperature between the BTS platform and the mall.”

In much of Thailand, 35 C is not considered a heat wave so much as the default loading screen between Songkran and rainy season. At that temperature, street vendors continue frying pork, motorcycle taxi drivers continue wearing jackets, and people still somehow order hot noodle soup under a zinc roof beside traffic.

British authorities warned people to stay hydrated, avoid prolonged exposure to the sun, and check on vulnerable neighbours. Thai residents, meanwhile, offered practical advice: drink water, walk slowly, stop pretending a small desk fan is a critical climate policy, and do not underestimate the spiritual power of iced cha yen in a plastic cup.

The heat also placed Britain’s national infrastructure under strain, including trains, roads, and the emotional stability of people living in homes designed to trap warmth like a Victorian punishment device.

Many British homes, built to survive damp winters and centuries of grey sky, are famously unprepared for sunshine arriving with ambition. In Thailand, by contrast, buildings are prepared for heat by installing air conditioners powerful enough to create a private Scandinavian microclimate inside every shopping mall.

Tourists were advised that if they find 35 C difficult in London, they should approach Bangkok in April with humility, sunscreen, and the understanding that shade in Thailand is not a location but a blessing.

Meteorologists said the record-breaking heat was part of a wider spring heat wave across Western Europe. Climate experts have warned that extreme heat is becoming more frequent, intense, and dangerous — though ordinary British citizens appeared mainly focused on whether it was now legally acceptable to eat dinner consisting entirely of watermelon and crisps.

By late afternoon, some residents had begun comparing London to the tropics, a statement Thailand has declined to recognise at this time.

“We appreciate the concern,” said one imaginary Thai weather official. “But legally, we cannot classify 35 C as ‘weather news.’”