The government plans to announce this year's comprehensive heat wave measures in the middle of this month. This measure includes an all-government response system matched to the newly introduced 'extreme heat emergency warning.' It also plans to strengthen protection for groups vulnerable to heat waves. The Korea Meteorological Administration will change heat wave alerts from the current 2-stage system to a 3-stage system starting in June. The new stages are advisory, warning, and emergency warning. The emergency warning is being reviewed as a plan to issue it when an apparent temperature of 38 degrees or higher or a maximum temperature of 39 degrees or higher continues. The government is focusing on support for residents of tiny room villages, older adults living alone, people with disabilities, outdoor workers, and mobile workers. It is also expanding everyday shelters in cooperation with financial institutions, railway operators, and distribution companies. To respond to heat waves, the operating period of the Central Disaster and Safety Countermeasures Headquarters has also increased a lot recently.
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Why this summer's news sounds especially sensitive
These days, when heat wave news comes out, it does not end with just 'It will be hot.' Your way to work, the time waiting for delivery, the electricity bill, and even the air inside your home come to mind right away, so it naturally sounds like this is really my problem.
What the government is preparing this time is not just a simple seasonal notice. The Korea Meteorological Administration said it will change heat wave alerts to a advisory-warning-emergency warning 3-stage system from June 2026, and the Ministry of the Interior and Safety also said it will adjust the response system to match this. If one more stage was added, it means the danger range has grown enough that stronger heat than before needs to be managed separately.
Especially, the new emergency warning is for times when daily highest apparent temperature of 38 degrees or higher or daily highest temperature of 39 degrees or higher is expected to continue. Apparent temperature means 'the heat the body actually feels,' including humidity and wind, and in a humid summer like Korea, even the same 35 degrees can feel much harder.
With the existing heat wave warning alone, it became hard to separate record-level heat.
It is mainly meant to give a stronger warning about a situation close to the same extreme heat wave in 2018.
Heat wave advisory, warning, and emergency warning: what changes and how
| Stage | Standard | What it means | Actions to think about |
|---|---|---|---|
| Heat wave advisory | Daily highest apparent temperature of 33 degrees or higher expected for 2 days or more | Heat that starts to make daily life hard | Reduce outdoor activity during the day and prepare water, shade, and rest |
| Heat wave warning | A daily maximum perceived temperature of 35 degrees or higher is expected for 2 days or more | Heat that clearly increases the chance of health harm | Check on older adults and people with chronic illness, and consider adjusting work hours |
| Severe Heat Wave Warning | In addition to the Heat Wave Warning level, a perceived temperature of 38 degrees or higher or a maximum temperature of 39 degrees or higher is expected to continue for 1 day or more | A separate warning for record-level, life-threatening extreme heat | Stop outdoor schedules, move to a nearby cooled space, and check vulnerable family members and coworkers right away |
Why the KMA special weather alert and the Interior Ministry crisis alert move separately
| Category | KMA Heat Wave Special Alert | Ministry of the Interior and Safety Heat Wave Crisis Alert |
|---|---|---|
| What it tells you | Weather risk by region | How strongly the government will respond |
| Main criteria | Perceived temperature 33 degrees and 35 degrees, and later a severe warning standard of 38 degrees/39 degrees will be added | Nationwide spread rate, duration, chance of damage, and need for a whole-of-government response |
| Level | Advisory-Warning-Severe Warning | Attention-Caution-Alert-Serious |
| What happens when it goes up | Directly warns people about weather danger | It can lead to a whole-of-government response like activating the Central Disaster and Safety Countermeasures Headquarters |
| Why they are separate | The purpose is weather judgment | The purpose is administrative and disaster response judgment |
Has the Korean summer really become longer and harsher?
| Category | Usual year | 2025 | How much it increased |
|---|---|---|---|
| Number of heat wave days | 11.0 days | 29.7 days | about 2.7 times |
| Number of tropical nights | 6.6 days | 16.4 days | about 2.5 times |
Why is heat directly a livelihood problem for some people?
Even in the same heat, for some people it ends with 'it is hot,' but for others it can go as far as getting sick, not being able to work, or being scared of the electricity bill. So the heat wave vulnerable groups the government talks about are not just a list of people with weak stamina, but closer to a list of people who have fewer ways to avoid the heat.
If you look at Korea Disease Control and policy materials, vulnerable groups repeatedly include older adults, older adults living alone, children, people with chronic illness, people with disabilities, low-income groups, and homeless people or residents of tiny single rooms. Outdoor workers and mobile workers are especially mentioned because even if they want to avoid the hottest hours, the work itself makes them keep moving outside.
Housing is also a big issue. In places like rooftop rooms, gosiwon, and tiny single rooms, ventilation and cooling are weak. So heat does not leave even at night. Then the daytime heat wave continues into tropical nights, and the body loses time to recover. That is why heat wave measures are not only about weather response, but also come together with cooling costs, shelters, safety check-ins, and adjusting work hours.
If you do not have enough time, place, money, or choice to avoid the heat, anyone can become more vulnerable.
The risk becomes much bigger especially when outdoor work, social isolation, and energy poverty happen together.
The real risk shown by heat illness statistics
If you look at the gender ratio of heat illness patients in 2024, you can understand why groups with a lot of outdoor activity and work exposure are repeatedly talked about as risk groups.
How did Korea come to treat heat waves as a 'disaster'?
The reason heat wave news sounds serious now did not happen in one day. If you look at how the system changed, you can understand why the government keeps bringing out bigger response systems.
2011: Hospitals started counting the danger first
When the heat-related illness emergency room monitoring system started, people began to see heat wave damage as the 'actual number of patients.' It was the first step of recognizing that heat is not just uncomfortable but a health risk inside the system.
2015: Heat wave alerts became year-round, not only for one season
As heat wave alert operation expanded to the whole year, heat waves began to be treated not as a summer exception but as a risk that must be managed anytime.
2018: Record heat waves changed awareness
In 2018, 4,526 heat-related illness patients and 48 estimated deaths were reported. From this point, Korean society began to see heat waves not as a 'hot summer' but as a disaster that can kill people.
After 2018: Laws and budgets started to move
With the revision of the Framework Act on Disaster and Safety Management, heat waves were included in the category of natural disasters, and after that the legal basis for support and response budgets became stronger.
2020~2023: It changed to feel more realistic with the heat index standard
To reflect humid heat that cannot be explained by only the highest temperature, heat wave alerts based on the heat index went through pilot operation and became official.
2024~2026: It is expanding to custom protection and neighborhood response
With cooling cost support, tropical night response, protection for the most vulnerable groups, neighborhood shelters, and even a new severe alert, heat wave measures are becoming more and more detailed.
Why banks, stations, and marts become shelters
| Category | Traditional public shelter | Neighborhood shelter |
|---|---|---|
| Main spaces | Senior center · Community service center (former dong office) · Welfare center | Bank · Station · Mart · Convenience store · Mobile carrier agency |
| Advantages | Institutionally stable and guidance is clear | Close to daily routes, so it is easy to take shelter right away |
| Limits | Distance, operating hours, and locked door problems | Without private sector agreements and awareness, using them can feel awkward |
| Why it became important | Focused on shelters you have to go find | Bring the cooling space right in front of you into the safety net |
| Policy direction | Use the existing welfare infrastructure | Expand into a daily-life network like the Climate Companion Shelter |
So, what I need to check first right now
When you see news like this, you might start to worry first. But with a heat wave, instead of only feeling vague fear, the most important thing is to first check what kind of person I am and where I am exposed to the heat.
Check first whether you move around outdoors a lot, whether your home stays hot even at night, and whether your family includes an elderly person living alone, a person with a chronic illness, or a person with a disability. If even one of these three applies, heat wave news is not someone else's story. It can be a sign that you really need to change your daily plan.
And this summer, it is good to check where the neighborhood heat shelters or local living-area shelters are, whether water, shade, and rest are guaranteed at your workplace, and whether you qualify for cooling cost support or an energy voucher. The reason the words severe heat wave warning sound so serious is not only because the heat is getting stronger, but also because for people who cannot avoid it, it quickly becomes a health, livelihood, and housing problem.
Shelter locations near home and work
People among family or neighbors whose well-being needs checking
Whether it is possible to adjust midday outdoor schedules or working hours
Whether you qualify for cooling cost support or an energy voucher
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