Dying of Something We Keep Calling Weather cover art
C1 · Advanced 15 min public healthclimatedemographicsgovernment policy

Dying of Something We Keep Calling Weather

El verano que aprendimos a contar los muertos
News from July 12, 2026 · Published July 13, 2026

About this episode

South Korea activated its first extreme heat warning under a new tiered alert system this week, a decision that sounds technical but hides decades of quiet deaths. Fletcher and Octavio dig into why heat kills more than we admit, what Spain and Europe learned the hard way, and what any of this has to do with South Korea's aging society.

Corea del Sur activó esta semana su primera alerta de calor extremo bajo un nuevo sistema de avisos por niveles, una decisión que parece técnica pero esconde décadas de muertes silenciosas. Fletcher y Octavio profundizan en por qué el calor mata más de lo que admitimos, qué han aprendido España y Europa a golpe de catástrofe, y qué tiene que ver todo esto con el envejecimiento de la sociedad coreana.

Your hosts
Fletcher
Fletcher Haines
English
Octavio
Octavio Solana
Spanish
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Key Spanish vocabulary

7 essential C1-level terms from this episode, with translations and example sentences in Spanish.

SpanishEnglishExample
ola de calor heat wave La ola de calor de 2003 causó miles de muertes en toda Europa.
umbral threshold Las temperaturas superaron el umbral establecido por el nuevo sistema de alertas.
isla de calor urbano urban heat island Las islas de calor urbano hacen que las ciudades sean varios grados más calientes que las zonas rurales.
llevar + participio to have been (in a state) for a duration Llevaban días muertos antes de que alguien los encontrara.
pobreza energética energy poverty La pobreza energética impide que muchas familias enciendan el aire acondicionado incluso cuando lo necesitan.
en ausencia in the absence of / in absentia El sistema de avisos por niveles debe funcionar incluso en ausencia de una respuesta ciudadana activa.
aviso por niveles tiered warning / alert system El aviso por niveles permite coordinar respuestas distintas según la gravedad de la situación.

Transcript

Fletcher EN

Here's a question I've been sitting with all week: when does weather become a public health emergency, and why does it take so long for governments to admit that it does?

Octavio ES

Pues fíjate, Fletcher, que esa pregunta tiene una respuesta concreta esta semana.

Well, that question has a concrete answer this week, Fletcher.

Corea del Sur acaba de emitir su primera alerta de calor extremo bajo un sistema completamente nuevo, un sistema por niveles que llevan años diseñando y que, hasta ahora, nunca había llegado a activarse.

South Korea just issued its first extreme heat warning under a brand-new system, a tiered system they've been designing for years and that, until now, had never actually been triggered.

Fletcher EN

Right, so the cities are Gyeongsan and Pohang, both in North Gyeongsang Province, which is in the southeast of the country.

And the framing matters here: this isn't just a heat advisory, it's the first activation of a new emergency tier.

Octavio ES

Exacto.

Exactly.

Y eso no es un detalle administrativo.

And that's not an administrative detail.

Que un país diseñe un sistema de avisos por niveles y que ese sistema se active por primera vez significa que las temperaturas han alcanzado umbrales que los propios meteorólogos consideraban, hasta hace poco, demasiado extremos para ser frecuentes.

When a country designs a tiered warning system and that system gets triggered for the first time, it means temperatures have hit thresholds that the meteorologists themselves considered, until recently, too extreme to occur very often.

Fletcher EN

Which tells you something about where the baseline has moved.

Octavio ES

Exactamente eso.

Exactly that.

Mira, Corea del Sur no es un país que haya ignorado el calor.

Look, South Korea is not a country that has ignored heat.

Tienen un sistema de vigilancia de salud pública bastante serio.

They have a fairly serious public health surveillance system.

Pero lo que han hecho ahora es reconocer oficialmente que hay una categoría de calor que va más allá de lo que su infraestructura habitual puede gestionar.

But what they've done now is officially recognize that there's a category of heat that goes beyond what their standard infrastructure can handle.

Fletcher EN

And that recognition, I'd argue, is itself the story.

Because there's a long and somewhat grim history of countries not making that recognition until after a lot of people have died.

Octavio ES

Eso es completamente cierto, y Corea del Sur lo sabe por experiencia propia.

That's completely true, and South Korea knows it from its own experience.

En 2018 tuvieron el verano más caluroso en décadas.

In 2018 they had the hottest summer in decades.

Murieron decenas de personas.

Dozens of people died.

Y eso sin contar los miles de hospitalizaciones que no se registran como muertes por calor porque el médico de turno escribe 'fallo cardíaco' o 'deshidratación severa' en el certificado.

And that's without counting the thousands of hospitalizations that don't get recorded as heat deaths because the attending physician writes 'cardiac failure' or 'severe dehydration' on the certificate.

Fletcher EN

That undercounting problem is massive.

Every epidemiologist I've ever spoken to about this says the official heat death figures are, without exception, an underestimate.

Octavio ES

Y aquí es donde entra Europa, porque nosotros aprendimos esa lección de la manera más brutal posible.

And this is where Europe comes in, because we learned that lesson in the most brutal way possible.

El verano de 2003.

The summer of 2003.

Quince mil muertos en Francia.

Fifteen thousand dead in France.

España, Italia, Portugal, todos golpeados.

Spain, Italy, Portugal, all hit hard.

En total, más de setenta mil muertos en Europa en unas pocas semanas.

In total, more than seventy thousand dead across Europe in a few weeks.

Fletcher EN

I was in Beirut in August of 2003, and I remember the dispatches coming out of Paris and thinking: this is a European city, this is supposed to be a place with functioning infrastructure, and the morgues are full.

Octavio ES

Lo que pasó en Francia fue que el gobierno tardó en reaccionar, los médicos estaban de vacaciones, los ancianos morían solos en apartamentos sin aire acondicionado.

What happened in France was that the government was slow to react, doctors were on vacation, elderly people were dying alone in apartments with no air conditioning.

España reaccionó un poco mejor porque estábamos, digamos, culturalmente más habituados al calor, pero tampoco fue una respuesta brillante.

Spain reacted somewhat better because we were, let's say, culturally more accustomed to heat, but it wasn't a brilliant response either.

Fletcher EN

Though that cultural familiarity is interesting, because you'd think countries that already know what summer heat feels like would have better systems.

But the 2003 wave was above and beyond anything in living memory.

Octavio ES

El problema es ese: la gente confunde el calor que conoce con el calor que mata.

That's exactly the problem: people confuse the heat they know with the heat that kills.

Treinta y cinco grados en Madrid es un día de verano normal.

Thirty-five degrees in Madrid is a normal summer day.

Cuarenta y dos grados durante doce días seguidos, con noches que no bajan de veintiocho, es otra cosa completamente distinta.

Forty-two degrees for twelve straight days, with nights that don't drop below twenty-eight, is something else entirely.

El cuerpo no descansa.

The body doesn't rest.

No se recupera.

It doesn't recover.

Y el daño se acumula.

And the damage accumulates.

Fletcher EN

And that's a point that gets lost in the public conversation.

We talk about peak temperatures, but the nighttime low might matter even more.

Octavio ES

Completamente.

Completely.

Los fisiólogos hablan de la temperatura de bulbo húmedo, que combina calor y humedad, y hay un umbral, aproximadamente treinta y cinco grados de bulbo húmedo, por encima del cual el cuerpo humano no puede enfriarse por sí solo, independientemente de cuánto sudes.

Physiologists talk about the wet-bulb temperature, which combines heat and humidity, and there's a threshold, roughly thirty-five degrees wet-bulb, above which the human body simply cannot cool itself down no matter how much it sweats.

Hay partes de Asia meridional que ya están rozando ese límite.

Parts of South Asia are already brushing up against that limit.

Fletcher EN

That number stopped me when I first read about it.

Because it means there's a physical ceiling beyond which shade and water and rest don't actually save you.

Octavio ES

Y Corea del Sur, aunque no está en esa zona de riesgo extremo todavía, sí tiene un factor que lo complica todo: la humedad.

And South Korea, though it's not in that extreme risk zone yet, has a factor that complicates everything: humidity.

Pohang y Gyeongsan están en el sureste, una zona costera e industrial.

Pohang and Gyeongsan are in the southeast, a coastal and industrial area.

El calor allí no es el calor seco del interior;

The heat there isn't dry interior heat;

es pegajoso, opresivo.

it's sticky, oppressive.

El cuerpo trabaja mucho más.

The body works much harder.

Fletcher EN

Pohang, for context, is a major steel-producing city.

So you've got industrial heat layered on top of ambient heat.

The workers there are not sitting in offices.

Octavio ES

Ese es un punto crucial, y conecta con algo que pocas veces se menciona cuando se habla de alertas de calor: no afectan a todo el mundo por igual.

That's a crucial point, and it connects to something rarely mentioned when we talk about heat alerts: they don't affect everyone equally.

Los trabajadores de la construcción, los agricultores, los repartidores en moto, los trabajadores industriales, todos ellos tienen una exposición que los trabajadores de oficina simplemente no comprenden.

Construction workers, farmers, delivery riders, industrial workers, all of them have an exposure that office workers simply don't understand.

Fletcher EN

And then there's the demographic layer, which in South Korea is particularly stark.

South Korea has one of the fastest-aging populations in the world.

The elderly are disproportionately vulnerable to heat.

And they're increasingly living alone.

Octavio ES

Eso es fundamental para entender por qué esta alerta importa más de lo que parece.

That's fundamental to understanding why this alert matters more than it seems.

Corea del Sur tiene ya una tasa de fecundidad de alrededor de 0,7, la más baja del mundo.

South Korea already has a fertility rate of around 0.7, the lowest in the world.

La sociedad está envejeciendo a una velocidad que el propio gobierno describe como una crisis existencial.

Society is aging at a speed the government itself describes as an existential crisis.

Y los ancianos que viven solos en ciudades sin sistemas de apoyo suficientes son exactamente las víctimas silenciosas de las olas de calor.

And elderly people living alone in cities without adequate support systems are exactly the silent victims of heat waves.

Fletcher EN

There's a particularly cruel irony there.

The same demographic pressures that are straining their healthcare and pension systems are also producing the population most at risk when things get extreme.

Octavio ES

Y la soledad agrava todo.

And loneliness makes everything worse.

En el calor, la gente muere sola porque nadie llama, nadie pasa por casa.

In the heat, people die alone because nobody calls, nobody stops by.

En Francia en 2003 descubrieron, cuando llegaron a los apartamentos, que algunos ancianos llevaban días muertos.

In France in 2003 they discovered, when they reached the apartments, that some elderly people had been dead for days.

Sus vecinos no lo sabían.

Their neighbors didn't know.

Eso no es solo un problema climático;

That's not just a climate problem;

es un problema de tejido social.

it's a social fabric problem.

Fletcher EN

Which brings me to a question I genuinely can't answer: what does an alert system actually do for someone who is eighty-three, lives alone, doesn't have a smartphone, and has no air conditioning?

The warning exists.

Does it reach them?

Octavio ES

Esa es la pregunta correcta, y la respuesta honesta es: depende completamente de lo que haya detrás del aviso.

That's exactly the right question, and the honest answer is: it depends entirely on what's behind the warning.

Un aviso sin recursos no es más que un cartel.

A warning without resources is just a sign.

Lo que marca la diferencia es si el gobierno abre centros de refugio con aire acondicionado, si los servicios sociales hacen llamadas proactivas, si los vecinos tienen instrucciones sobre a quién vigilar.

What makes the difference is whether the government opens air-conditioned refuge centers, whether social services make proactive calls, whether neighbors have instructions about who to check on.

Fletcher EN

Spain actually has a reasonably detailed response protocol at this point, yes?

Because the 2003 disaster, and then 2022, which was brutal, forced the issue.

Octavio ES

Sí, AEMET, que es la agencia estatal de meteorología, tiene un sistema por niveles: amarillo, naranja, rojo.

Yes, AEMET, the national meteorology agency, has a tiered system: yellow, orange, red.

Y lo que hace cada nivel no es solo emitir un comunicado.

And what each level does is not just issue a statement.

El nivel rojo activa protocolos en hospitales, en residencias de mayores, en servicios de emergencia.

The red level activates protocols in hospitals, in care homes for the elderly, in emergency services.

Las comunidades autónomas tienen planes específicos.

The autonomous regions have specific plans.

No es perfecto, pero existe y tiene dientes.

It's not perfect, but it exists and has teeth.

Fletcher EN

Having teeth is the key phrase.

Because the gap between a system that exists on paper and one that actually changes behavior on the ground is where people die.

Octavio ES

Y esa brecha existe en casi todas partes.

And that gap exists almost everywhere.

En 2022, España tuvo más de cuatro mil trescientas muertes atribuidas al calor en un verano.

In 2022, Spain had more than four thousand three hundred deaths attributed to heat in a single summer.

Con el plan.

With the plan.

Con los avisos.

With the warnings.

Porque el plan no puede compensar la falta de aire acondicionado en las viviendas más antiguas, ni la pobreza energética que hace que la gente no lo encienda aunque lo tenga.

Because the plan cannot compensate for the lack of air conditioning in the oldest homes, or the energy poverty that means people don't turn it on even if they have it.

Fletcher EN

Energy poverty.

That's a phrase that doesn't get nearly enough attention in these conversations.

The people least able to afford cooling are often the most physically vulnerable to heat.

Octavio ES

Es una paradoja brutal.

It's a brutal paradox.

Y en Corea del Sur tiene una dimensión adicional, porque es una sociedad muy urbanizada con una densidad altísima.

And in South Korea it has an additional dimension, because it's a very urbanized society with extremely high density.

Las islas de calor urbano en Seúl, en Busan, elevan las temperaturas varios grados por encima de las zonas rurales.

The urban heat islands in Seoul, in Busan, push temperatures several degrees above rural areas.

La ciudad misma se convierte en un amplificador.

The city itself becomes an amplifier.

Fletcher EN

And there's an architecture piece here too.

South Korea built an enormous amount of its urban housing stock very fast, in the sixties and seventies and eighties, during the economic miracle period.

That housing was not designed for the summers they're having now.

Octavio ES

Ese problema lo conocemos bien en España.

That's a problem we know well in Spain.

Tenemos ciudades del interior, como Sevilla o Córdoba, que tienen una arquitectura tradicional adaptada al calor: patios, paredes gruesas, orientación norte en las ventanas principales, vegetación.

We have interior cities, like Seville or Córdoba, with traditional architecture adapted to the heat: courtyards, thick walls, north-facing main windows, vegetation.

Y luego tenemos los bloques de los años setenta, que son trampas de calor.

And then we have the apartment blocks from the seventies, which are heat traps.

Quien vivió el boom del ladrillo sabe exactamente de lo que hablo.

Anyone who lived through the property boom knows exactly what I'm talking about.

Fletcher EN

The courtyard design is genuinely ingenious when you think about the physics of it.

That's thousands of years of accumulated knowledge about how to keep a building livable in summer.

Octavio ES

Conocimiento que tiramos a la basura en nombre de la eficiencia constructiva y que ahora estamos intentando recuperar.

Knowledge we threw away in the name of construction efficiency and that we're now trying to recover.

Hay arquitectos en Madrid que están redescubriendo la orientación bioclimática como si fuera algo nuevo.

There are architects in Madrid rediscovering bioclimatic orientation as if it were something new.

No es nuevo.

It's not new.

Los romanos lo sabían.

The Romans knew it.

Los árabes en Andalucía lo perfeccionaron.

The Arabs in Andalusia perfected it.

Fletcher EN

That feels like the central tension of this whole topic: we have ancient knowledge, we have modern science, and somehow we still end up publishing a heat warning in 2026 and calling it a first.

The gap between what we know and what we've built is enormous.

Octavio ES

Porque la voluntad política sigue sin estar a la altura.

Because political will is still not up to the task.

El calor no es fotogénico.

Heat is not photogenic.

Una inundación tiene imágenes devastadoras.

A flood has devastating images.

Un incendio tiene llamas.

A fire has flames.

El calor mata en silencio, en apartamentos cerrados, sin que nadie lo vea, y eso hace que políticamente sea mucho más fácil de ignorar.

Heat kills in silence, in closed apartments, without anyone seeing it, and that makes it politically much easier to ignore.

Fletcher EN

I've covered disasters on the ground, and there's something to that.

The image drives the response.

You can show a collapsed building.

You can show a flooded street.

You cannot photograph the moment heat overcomes a seventy-eight-year-old woman's cardiovascular system.

Octavio ES

Y eso cambia cuando los números se vuelven imposibles de ignorar.

And that changes when the numbers become impossible to ignore.

En Francia, después de 2003, hubo cambios reales: planes de vigilancia para ancianos en riesgo, apertura obligatoria de espacios refrigerados, formación de los servicios sociales.

In France, after 2003, there were real changes: surveillance plans for at-risk elderly, mandatory opening of cooled spaces, training for social services.

No por voluntad propia del gobierno, sino porque quince mil muertos en agosto se volvió políticamente insostenible.

Not out of the government's own volition, but because fifteen thousand dead in August became politically unsustainable.

Fletcher EN

Which is a deeply depressing model for policy change.

The question is whether South Korea can learn from those precedents without first having to live through a comparable catastrophe.

Octavio ES

Eso es lo que hace que este nuevo sistema sea, en cierto modo, esperanzador.

That's what makes this new system, in a way, hopeful.

Que lo hayan puesto en marcha antes de una catástrofe, no después, sugiere que alguien en el gobierno coreano ha estudiado lo que pasó en Europa y ha decidido no repetirlo.

That they've put it in place before a catastrophe, not after, suggests that someone in the Korean government has studied what happened in Europe and decided not to repeat it.

Ojala tengan razón en los detalles.

Let's hope they've got the details right.

Fletcher EN

There's something you said earlier that I keep turning over.

You said the bodies were found days later and the neighbors didn't know.

And I noticed in Spanish you used a tense I don't always catch, when you said 'llevaban días muertos.' That's not the simple past.

What's happening there, grammatically?

Octavio ES

Buena pregunta.

Good question.

'Llevar' más un gerundio o un participio es una de las construcciones más útiles del español y que los angloparlantes casi nunca aprenden bien.

'Llevar' plus a gerund or participle is one of the most useful constructions in Spanish and one that English speakers almost never learn properly.

'Llevaban días muertos' significa que ese estado, estar muertos, había durado días de manera continua hasta el momento en que alguien los encontró.

'Llevaban días muertos' means that state, being dead, had persisted continuously for days up until the moment someone found them.

Puedes usarlo para cualquier duración: 'llevo dos horas esperando', 'llevamos años discutiendo esto.'

You can use it for any duration: 'I've been waiting two hours', 'we've been arguing about this for years.'

Fletcher EN

So it's about duration that's been ongoing up to a fixed point.

In English we'd say 'they had been dead for days,' but 'llevar' somehow captures the weight of that continuity more than just translating it directly would suggest.

Octavio ES

Exactamente.

Exactly.

Y tiene una fuerza que el 'había estado' no tiene, porque 'llevar' implica que la duración importa, que el tiempo transcurrido es parte de lo que quieres comunicar.

And it carries a force that 'había estado' doesn't, because 'llevar' implies that the duration matters, that the time elapsed is part of what you want to communicate.

Es por eso que lo usé en ese contexto y no 'estaban muertos.' La duración era, precisamente, la parte más perturbadora de la historia.

That's why I used it in that context and not just 'estaban muertos.' The duration was, precisely, the most disturbing part of the story.

Fletcher EN

That's useful.

And a little sobering to realize the grammar was doing emotional work I almost missed.

Llevaban días muertos.

I'll probably get the conjugation wrong the first six times I try to use it, but I'll try.

Octavio ES

Fletcher, lleva años intentando hablar español y cada vez que lo intenta me llevo una sorpresa distinta.

Fletcher, you've been trying to speak Spanish for years and every time you try I get a different kind of surprise.

Pero esa, la de 'llevar', no te saldrá tan mal.

But that one, 'llevar', won't go as badly for you.

Es menos peligrosa que 'embarazado.'

It's less dangerous than 'embarazado.'

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