Japan, South Korea had hottest summer on record in 2025

TOKYO - Japan and South Korea sweltered in 2025 through the hottest summers since records began, their weather agencies said on Sept 1.

Temperatures the world over have soared in recent years as climate change creates ever more erratic weather patterns.

Japan’s average temperature between June and August was 2.36 deg C above the standard value, which marked the hottest summer since records began in 1898, according to the Japan Meteorological Agency (JMA).

“It was the third consecutive summer of record-level high temperatures,” the JMA added.

During that same period in South Korea, the average temperature was 25.7 deg C, “the highest since data collection began in 1973”, the Korea Meteorological Administration said in a press release. The previous record over the same period was 25.6 deg C, set just in 2024.

In Tokyo, avid runner Masao Nakano, 80, told AFP he pines for the old days when he could just “step outside, sprinkle water in the street and feel the cool air”.

Mr Nakano says he survived the sizzling summer by working out at a gym and jogging to prepare for a marathon.

“This is crazy. It’s all man-made, right? All the air-cons and power generation”, he said.

Japan’s beloved

cherry trees are blooming earlier

due to the warmer climate, or sometimes not fully blossoming because autumns and winters are not cold enough to trigger flowering, experts say.

The famous snowcap of Mount Fuji was absent for the longest recorded period in 2024, not appearing until early November, compared with the average of early October.

In South Korea, the country is grappling with a prolonged drought that has hit the eastern coastal city of Gangneung.

A state of national disaster has been declared in the city of 200,000 after weeks without rain, with water levels at the Obong reservoir, the city’s main source of piped water, falling below 15 per cent.

The dry spell has forced the authorities to implement water restrictions, including shutting off 75 per cent of household meters.

Heatwaves are becoming more intense and frequent worldwide because of human-caused climate change, scientists say.

But the speed of temperature increases across the world is not uniform.

Of the continents, Europe has seen the fastest warming per decade since 1990, followed closely by Asia, according to global data from the US National Oceanic and Atmospheric Administration.

The United Nations warned in August that rising global temperatures are having an ever-worsening impact on the health of workers, and are also hitting productivity, which they say dropped by 2 to 3 per cent for every degree above 20 deg C. AFP