Hot spots are invisible
People feel heat but can't tell which streets, courtyards or rooftops are most exposed.
SDG 13 · Climate Action · Skill Fusion Edition 4
Photograph any spot in your city. Get a heat estimate, a local plan, and a clear view of where shade and trees would help most.
First city: Chhatrapati Sambhajinagar, Maharashtra
The problem
People feel heat but can't tell which streets, courtyards or rooftops are most exposed.
"It will be hot" doesn't say what to do on your street or school ground.
Trees go where there is space, not always where they would cool the most.
The US EPA reports that daytime air temperatures in urban areas are about 1 to 7°F (0.6 to 3.9°C) higher than in outlying areas, and about 2 to 5°F (1.1 to 2.8°C) higher at night. US EPA
The WHO estimates about 489,000 heat-related deaths each year between 2000 and 2019, 45% of them in Asia. Deaths among people over 65 rose by about 85% between 2000–2004 and 2017–2021. WHO
A review of 308 studies, cited by the US EPA, found urban forests were on average 3.0°F (1.6°C) cooler than urban areas without greenery. US EPA
Sources read and checked on 29 October 2026. Our own scan results are estimates and are labelled that way.
How it works
One grade per spot, always labelled an estimate with a confidence level.
Compare "no action" with "plant trees" as the canopy grows.
Submit a photo and tag; it is cross-checked against Open-Meteo for that time and place.
Live
Information only. Always follow official government warnings.
Public map
Satellite view. Zoom out and the map wraps into planet Earth. Approximate locations only (about 100 m). No photos, no faces, no personal data.
Explore
Our city in 3D: real building heights, live weather, scanned spots, and a sun slider that moves the shadows through the day.
Live tornado alerts, severe storms and tsunami-flagged earthquakes on a globe, with links to the official warning agencies.
In the app: photograph a tree and confirm its name, follow your profile and streak, and finish daily quests for XP.
Ask the Expedition
Answers come only from our verified knowledge base, and every answer shows its source. If there is no source, it says so instead of guessing.
Leaderboard
Nicknames only. XP comes from confirmed scans and verified weather reports.
| # | Explorer | Level | XP |
|---|---|---|---|
| Loading… | |||
Get the app
Camera scan, GPS, alerts, map and rewards.
The app and this site are clients of one public API.
Developers
Base URL: …
| Method | Path | What it does |
|---|---|---|
| GET | /v1/risk?lat&lon | Weather, air quality, risk level, alert and nearby events |
| GET | /v1/spots | Anonymised spots with A-F grades (public) |
| GET | /v1/spots/:id/report | Public summary for a spot |
| POST | /v1/auth/anon | Nickname-only account, returns a bearer token |
| POST | /v1/scans | Upload a photo + GPS, returns a scan id (async) |
| GET | /v1/scans/:id | Progress, then the full report with estimates |
| POST | /v1/scans/:id/confirm | Confirm or correct; saves feedback; rewards |
| POST | /v1/weather-reports | Photo + tag, verified against Open-Meteo |
| GET | /v1/hazards?kind=tornado|tsunami | Tornado alerts, storms and tsunami-flagged earthquakes, with official links |
| POST | /v1/ask | Sourced answers from the verified knowledge base |
| GET | /v1/leaderboard?period=week|all | Top explorers (nickname, level, XP) |
| POST | /v1/trees | Tree spotter: photo in, AI name guesses out (confirm to earn XP) |
| GET | /v1/profile | Your stats, streak, badges and 14-day XP |
| GET | /v1/quests | Today's quests; claim with POST /v1/quests/:id/claim |
| GET | /v1/health | Feed status and service health |
Safety & privacy
Credits
Weather & air quality: Open-Meteo (CC BY 4.0) · Earthquakes: USGS · Events: NASA EONET · Map: MapLibre GL, satellite imagery © Esri, Maxar, Earthstar Geographics · AI: NVIDIA API · App: Flutter · API: Node.js, Hono, SQLite · Hosting: Cloudflare · Type: Fraunces, Inter. Full list on the credits page.