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FortyGuard was proud to join the Health in Climate AI Hackathon in London as its Temperature Data and API Partner — putting hyperlocal heat intelligence directly into the hands of the builders, clinicians, and climate innovators working to solve some of the hardest problems at the intersection of climate and health.

Held on June 20–21 as part of London Climate Action Week 2026, the hackathon was brought to the city by the United Nations Climate Change Global Innovation Hub, alongside Kickstart Global and a coalition of technology, insurance, and academic partners. The brief was as urgent as it was open-ended: where AI meets the climate-health crisis. Over two days, a room full of innovators took on real challenges from the institutions building the response to a warming world.

Why temperature belonged in the room

You cannot build meaningful climate-and-health solutions without knowing how hot it actually is — not at the scale of a city or a weather station, but at the scale where people live, work, and move.

That is the gap FortyGuard exists to close. Our Temperature API delivers 2-meter precision temperature data — real-time, historical, and forecasted — at a street, block, and asset level, powered by our Large Temperature Models (LTMs). It is intelligence built for direct operational use, and it is up to 115x more accurate than conventional weather models.

For a hackathon focused on climate and health, that precision matters. Heat is one of the most direct and underappreciated links between a changing climate and human wellbeing, and its impact is profoundly local — a shaded street and an exposed one a block away can differ by several degrees. By making our temperature data and API available to participating teams, FortyGuard gave innovators a foundation they could build on immediately, without having to solve the temperature problem themselves first.

Putting the API in builders' hands

As a Temperature Data and API Partner, our role was straightforward: provide teams with access to hyperlocal temperature intelligence and the technical support to use it. From there, the creativity was theirs.

Hyperlocal temperature data is a natural building block for exactly the kind of solutions a climate-health hackathon is designed to surface — heat-health early-warning tools, mapping of heat exposure across vulnerable communities, cooling and shade-access planning, worker-safety and outdoor-labor applications, and models that connect ambient temperature to real health outcomes. Whatever direction teams chose, having a reliable, granular temperature layer meant they could spend their limited hours building and refining rather than wrangling data.

What stood out to us was the pace. In a hackathon environment, ideas move from concept to working prototype in a matter of hours — and seeing external innovators pick up our data and put it to work at that speed was a genuine validation of the platform. It is one thing to design an API for enterprise integrations; it is another to watch it hold up under the fast, experimental, high-pressure conditions of a hackathon and help teams ship something real.

What it meant for FortyGuard

Supporting an event like this reflects something we believe deeply: temperature is foundational infrastructure intelligence, not a background climate metric. When temperature data becomes as accessible as a weather forecast — but far more precise and far more actionable — developers and innovators can build things that simply were not possible before.

The London hackathon showed that our data doesn't only belong in the hands of cities, utilities, and enterprises. It belongs anywhere people are building for a hotter world. Seeing our temperature intelligence circulate through a community of independent innovators, and become a raw material for new climate-health solutions, is exactly the future we are working toward.

Next up: FortyGuard's own Hackathon'26

London affirmed what we already suspected — that when you give sharp minds a sharp temperature layer, remarkable things happen quickly. So we're taking the next step and opening the doors ourselves.

FortyGuard is hosting its own Hackathon'26, an invitation to developers, students, and climate-tech builders everywhere to build directly on our temperature data and APIs and turn hyperlocal heat intelligence into the next generation of solutions.

Want to build with temperature intelligence? Explore FortyGuard Hackathon'26 here.