On Sept. 2, 2026, the United Nations Environment Program report, Limiting Overshoot, declared that the world has fallen short of keeping global warming to 1.5°C above pre-industrial levels, and that urgent action is needed to course-correct.
asserted
action → limit → levels
That same week, NPR reported that extreme heat killed nearly five times as many people in the United States as official records indicated.
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records → report → States
These findings followed two consecutively brutal summers.
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findings → follow → summers
Death counts from heatwaves across Europe dominated news cycles this year as the continent’s aging infrastructure struggled to cool down.
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infrastructure → dominate → cycles
“Heat domes” trapped heat across the United States.
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domes → trap → States
But merely counting deaths from heat risks missing its impact on human life.
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counting → count → life
Each heat dome in the U.S. affected over 100 million people.
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dome → affect → people
Among them were construction workers, outdoor workers, delivery workers in unairconditioned cabs, farm workers, the unhoused, the poor who could not afford air conditioning, those on medications on whom the impact of heat was amplified, those with mental health disorders, and those with little or no access to healthcare.
uncertain
impact → afford → healthcare
According to the International Labor Organization, billions of workers around the world are exposed to extreme heat every year.
uncertain
billions → accord → heat
While the vast majority of them do not die, many suffer deeply from the arduous ignominy of a life exposed to heat, day and night, year after year.
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many → die → year
While counting deaths from heat is an imperfect science, the quantification of heat’s impact on mental health, physical well-being, wages, food security, habitat, and infrastructure is even more complex.
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quantification → count → health
One thousand women working in India’s informal labor economy have set out to quantify this burden—to understand what impact the heat and humidity in their lived environments at home and at work have on their health, wages, and well-being.
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heat → work → health
Partnering with our team at Harvard, the Self Employed Women’s Association in India has recruited women from trades including street vendors, waste recyclers, home-based artisans, and farmers to participate in the Community Heat Adaptation and Treatment Strategies (CommHATS) study.
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Association → partner → study
For 13 months, each woman is equipped with a wrist wearable, microsensors measuring heat and humidity at home and workplaces, labs measuring critical biomarkers, and surveys documenting home and work layouts, wellbeing, and wages.
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woman → equip → layouts
Considered together, this data constructs one of the world’s largest such databases of the impact of heat on human health.
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data → consider → health
Building on prior work that has shown that long exposure to heat impacts multiple organ systems, including the heart and kidneys, the CommHATS project seeks to address unanswered questions in our attempts to adapt to extreme heat: How do we know if cool roofs work?
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roofs → build → heat
If the temperature drops a bit, but I still cannot sleep restfully, is the intervention valid?
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intervention → drop → ?
What should the threshold for a new heat insurance product be: the temperature at the airport where the weather station is, or the temperature in my home, which is actually how hot I feel?
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I → feel → home
In India, where over half of women of reproductive age are anemic, how does heat further stress their hearts?
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heat → stress → hearts
Through community meetings and WhatsApp groups, research findings are regularly shared with all participants, who routinely ask how the data will help improve their lives.
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data → share → lives
Early findings, which we will share at New York Climate Week, reveal devastating wage losses on hot days, shortened sleep spans, and high cardiac stress.
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we → share → days
This kind of relentless, unforgiving heat forces a different kind of reckoning that goes beyond OSHA regulations and market solutions.
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that → force → regulations
In places like India, where around 90% of workers are informally employed, there is no employer to hold accountable.
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% → employ → workers
The poor have no choice but to adapt.
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poor → have → choice
They change working hours at the cost of childcare.
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They → change → childcare
They reallocate savings to protect health and wages.
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They → reallocate → health
They buy water jugs to carry potable water, and awnings to create shade, and ice chests to cool their produce.
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They → buy → produce
The woefully underfunded global financial instruments for heat adaptation have no existing structural mechanism to actually reach the most vulnerable, and so those most at risk bear the price themselves.
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those → have → price
The CommHATS project is implemented daily by grassroots workers, a testament to its ease of use.
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project → implement → use
They check on the sensors and the wearables, and most importantly, the participating workers.
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They → check → sensors
The participants are invested in the questions, the tools, and the analysis.
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participants → invest → questions
The tool is thus built for scale and can help communities anywhere in the world understand what their environmental exposure is at an actionable scale that is relevant to decision-making.
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that → build → making
It helps measure exposure as well as the efficacy of interventions.
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It → help → interventions
In our study, we find that the cost of our collective inaction is already being borne by those whose lives are already stressed.
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lives → find → those
The human spirit is resilient, and perhaps life goes on.
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life → go → ?
But in this warming world, life is compromised and diminished.
asserted
life → warm → world
Millions may still live through extreme heat and not yet enter the death counts, but they cannot thrive.
uncertain
they → live → counts
The Aporia
