The Asia you know is losing to the heat

Extreme heat was always supposed to be a poor country's problem. This summer, East Asia's richest economies are proving that wrong.

South Korea, Japan, China and Taiwan have used their wealth to prepare: overhauling warning systems, mandating protections for workers, subsidising cooling, and building heat-resilient infrastructure across their cities. Those investments have slowed the toll. They have not stopped it.

For travellers to Japan, South Korea or China, the summer of 2026 has added a new variable. Extreme heat is scrambling itineraries across the region, pushing visitors toward after-dark sightseeing and indoor alternatives as hotels hand out heat-safety guidance alongside transport maps.
 

Being able to redesign a holiday season around the heat is itself a function of wealth. For the developing countries watching from the sidelines, those advantages are largely absent, and the gap between what the heat demands and what international finance delivers is widening by the year.

Wealth buys a longer runway, better tools, and the capacity to respond fast. What it does not buy is immunity. If the best-resourced corner of Asia is reaching the limits of what money and engineering can do, the question of what happens to countries without those advantages is already being answered.

Consider what this season has looked like.

In South Korea, Yangsan hit 42.5 degrees Celsius, the highest reading in 122 years of record keeping. The government overhauled its heat warning system for the first time in 18 years, expanded warning zones, opened cooling shelters and directed ministries to protect vulnerable workers. The president called the heatwave a national disaster after it killed more than 20 people.

In Japan, workplace heatstroke prevention became mandatory from June 2025 and deaths at work fell by half. Tokyo waived water charges for 8 million households so residents would not hesitate to run their air conditioning. By late July the country had still logged five straight days at or above 40 degrees and more than 10,000 hospitalisations in a single week.

China has invested at scale in urban cooling, rolling out green infrastructure under a national policy framework and subsidising high-efficiency air conditioning from January 2026. Power grids across northern, northeastern and eastern China hit record loads anyway. Taiwan staged its first nationwide drill for a 40-degree heatwave, compiled 9,641 designated cooling centres and built an AI system that forecasts dangerous indoor temperatures for elderly people living alone.

Across South and Southeast Asia, the same heat arrives stripped of those defences. In India, roughly 380 million people labour in heat-exposed jobs, most of them informally, without guaranteed rest breaks or employer liability. Only 8 percent of households own an air conditioner. On a single day in late April, all 50 of the world's hottest cities were within its borders.

In the Philippines, extreme heat has forced schools across the country to suspend in-person classes for the third consecutive year, sending millions of children home to houses without cooling. Heat is not even classified as a natural hazard under Philippine disaster law, so local officials lack the mandate or the funds that flow automatically for floods and typhoons. South Korea reengineered its national alert system and still lost more than 20 people. These countries face the same physics with no system to reengineer.

This is where geography turns into irony. The Green Climate Fund, the world's largest multilateral climate fund, is headquartered in Songdo, Incheon, one of the cities now issuing unprecedented heat warnings. The institution built to help vulnerable countries adapt sits inside a country discovering it is vulnerable too.

East Asia's experience points to where that money must go: alert systems, retrofitted housing, cooling centres, workplace protections and grids that can withstand peak demand. Countries with the capital to invest in such measures can also reshape their tourism economies around extreme heat, replacing lost summer seasons with evening markets and indoor alternatives. Countries without that capacity face a starkly different choice: they cannot adapt the season; they lose it. That is why these investments matter, and why developing countries cannot finance them alone. Current flows of climate finance fall far short of the scale and speed required.

The Green Climate Fund had a record year in 2025, approving $3.26 billion, and in 2026 approved a plan to open regional offices closer to the countries that need them. But speed is the missing variable. A heat that arrives faster every summer cannot wait for a disbursement cycle measured in years.

For decades, "developed" meant insulated. It was the capacity to buy your way out of trouble. This summer marks the point at which even the wealthiest economies begin to find the ceiling of what that capacity can do. For those that were never able to buy their way out in the first place, the ceiling was always the floor.

Rizwan Basir works in climate finance, specializing in blended finance mechanisms, and writes on the intersection of climate justice and infrastructure inequality across South Asia. 

This article was originally published by the Asia Media Centre and is republished here under a Creative Commons Attribution-NoDerivatives 4.0 International License.