Extrema Global Heat Risk Application
This overview was generated with AI from the public sources listed below and checked against them before publication. It has not had a complete human fact-check — treat it as a starting point and follow the sources.
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Athens, home to Europe's first Chief Heat Officer, offers the Extrema app: personalised heat-risk scores plus directions to the nearest air-conditioned building, shaded route or cooling park on dangerously hot days.
what does this mean?
The strongest source is an independent non-academic evaluation: an audit office, a government or EU review, or an NGO. It grades who did the looking — not how well the project went. All four grades →Sources
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Compare this project
A city notices the heat — what is it actually able to do?
Four responses to the same hazard, ordered by how far the city's own hand reaches: from a post created by philanthropy to a plan that changes what hospitals and water carriers do on a forecast day.
| Project | Since | Status | Outcome | Evidence | Run by | Cost | What the city can actually act on |
|---|---|---|---|---|---|---|---|
| Heat Action PlanAhmedabad, 🇮🇳 | 2013 | Live | Ongoing | Peer-reviewed | City government, National government, Research institution | not public | A forecast triggers an alert the municipal corporation acts on, and the peer-reviewed literature calls it South Asia's first heat-health action plan. |
| Cool Pavement ProgrammeLos Angeles, 🇺🇸 | 2017 | Live | Succeeded | Peer-reviewed | City government | ~$40,000 per lane-mile (StreetsLA); FY2023 ~$4M from the Street Damage Restoration Fee | Physical change the city controls outright: reflective coating on residential streets, prioritised in the hottest neighbourhoods. |
| Extrema Global Heat Risk ApplicationAthens, 🇬🇷 | 2018 | Live | Ongoing | Independent | Research institution, City government | not public | Information rather than infrastructure: personalised heat-risk scores and directions to the nearest cool space. |
| Miami-Dade's Chief Heat Officer and Extreme Heat Action PlanMiami, 🇺🇸 | 2021 | Completed | Scaled back | Media | Regional government | not public | A post rather than a power — created with philanthropic seed money, and abolished when the budget and state law closed in. |
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📎 Cite this project
1001 Smart Cities (2026). “Extrema Global Heat Risk Application” — Athens, Greece. The Smart City Atlas. https://1001smartcities.org/projects/athens-heat-mitigation/ (last verified 2026-07-18). Data: CC BY 4.0.
The underlying data is free to reuse with attribution — see the open data page.