DisasterWeather

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Data sources

This site holds no weather or hazard data of its own. Everything shown comes from the organisations below, is attributed on the page where it appears, and links back to the original record. Where a source needs an API key that is not configured on this deployment, the affected pages say so rather than quietly showing less.

Official alerts

  • NOAA / National Weather Service Alerts (CAP)

    Official United States watches, warnings and advisories in Common Alerting Protocol format, including tornado, flood, winter storm and extreme temperature products.

    No key required
    Update frequency
    Continuous, within seconds of issuance
    Coverage
    United States and territories
    Marked stale after
    15 minutes
    Endpoint
    https://api.weather.gov/alerts/active
    Licence and terms
    US Government public domain. Requires a contact e-mail in the User-Agent header.

Weather forecasting

  • Open-Meteo Forecast API

    Primary weather provider: current conditions, hourly forecast to 16 days, daily forecast, UV, sunrise/sunset and WMO weather codes.

    No key required
    Update frequency
    Hourly (model runs every 1-6 h depending on model)
    Coverage
    Global, 1-11 km depending on the selected model
    Marked stale after
    3 hours
    Endpoint
    https://api.open-meteo.com/v1/forecast
    Licence and terms
    CC BY 4.0 - free for non-commercial use; commercial plans available

  • Open-Meteo Historical Weather API (ERA5)

    Historical weather. ERA5/ERA5-Land reanalysis - a model reconstruction constrained by observations, not a raw station record.

    No key required
    Update frequency
    Daily, with a 5-day lag behind real time
    Coverage
    Global, 1940 to present, ~9-25 km
    Marked stale after
    7 days
    Endpoint
    https://archive-api.open-meteo.com/v1/archive
    Licence and terms
    CC BY 4.0; ERA5 data from Copernicus Climate Change Service (C3S)

  • Open-Meteo Multi-Model API

    Side-by-side forecast comparison across ECMWF IFS, NOAA GFS, DWD ICON and others.

    No key required
    Update frequency
    Per model run (ECMWF 4x, GFS 4x, ICON 4x daily)
    Coverage
    Global
    Marked stale after
    12 hours
    Endpoint
    https://api.open-meteo.com/v1/forecast?models=...
    Licence and terms
    CC BY 4.0

  • OpenWeather One Call 3.0

    Optional secondary weather provider and an additional source of national weather-service alerts outside the United States.

    API key required
    Update frequency
    Every 10 minutes
    Coverage
    Global; alert coverage depends on national agency agreements
    Marked stale after
    3 hours
    Endpoint
    https://api.openweathermap.org/data/3.0/onecall
    Licence and terms
    Commercial API, key required. Free tier available.
    Environment variable
    OPENWEATHER_API_KEY

Earthquakes

  • USGS Earthquake Hazards Program

    Authoritative global earthquake catalogue: magnitude, depth, location, PAGER alert, tsunami flag.

    No key required
    Update frequency
    Every 1-5 minutes
    Coverage
    Global (M2.5+ globally, M1.0+ in the United States)
    Marked stale after
    30 minutes
    Endpoint
    https://earthquake.usgs.gov/fdsnws/event/1/query
    Licence and terms
    US Government public domain

Volcanoes

  • USGS Volcano Hazards Program (HANS)

    Official alert level and aviation colour code for US volcanoes, plus the text of the latest volcanic activity notice.

    No key required
    Update frequency
    On change; polled every 10 minutes
    Coverage
    United States (including Alaska, Hawaii, CNMI)
    Marked stale after
    3 hours
    Endpoint
    https://volcanoes.usgs.gov/hans-public/api/volcano/getElevatedVolcanoes
    Licence and terms
    US Government public domain

  • Smithsonian Global Volcanism Program

    Reference catalogue of Holocene volcanoes worldwide: name, country, type, elevation and coordinates.

    No key required
    Update frequency
    Weekly (Weekly Volcanic Activity Report)
    Coverage
    Global
    Marked stale after
    14 days
    Endpoint
    https://webservices.volcano.si.edu/geoserver/GVP-VOTW/ows
    Licence and terms
    Free for non-commercial use with attribution to the Smithsonian Institution

Tropical cyclones

  • NOAA National Hurricane Center

    Active tropical cyclones for the Atlantic and Eastern Pacific basins: position, intensity, pressure, movement and official advisory links.

    No key required
    Update frequency
    Every 6 hours, with intermediate advisories every 2-3 hours
    Coverage
    Atlantic, Eastern and Central Pacific basins
    Marked stale after
    6 hours
    Endpoint
    https://www.nhc.noaa.gov/CurrentStorms.json
    Licence and terms
    US Government public domain

Tsunami

  • NOAA Tsunami Warning Centers

    Official tsunami warnings, watches, advisories and information statements issued by the NTWC and PTWC.

    No key required
    Update frequency
    On issuance; polled every 2 minutes
    Coverage
    Pacific, Atlantic, Caribbean, US and Canadian coastlines
    Marked stale after
    1 hours
    Endpoint
    https://www.tsunami.gov/events/xml/PAAQAtom.xml
    Licence and terms
    US Government public domain

Floods

  • Open-Meteo Flood API (GloFAS)

    River discharge forecasts and flood return-period thresholds from the Global Flood Awareness System.

    No key required
    Update frequency
    Daily
    Coverage
    Global rivers, ~5 km grid
    Marked stale after
    2 days
    Endpoint
    https://flood-api.open-meteo.com/v1/flood
    Licence and terms
    CC BY 4.0; GloFAS by Copernicus Emergency Management Service

Wildfires

  • NASA FIRMS Active Fire Data

    Satellite thermal anomaly / active fire detections from VIIRS (S-NPP, NOAA-20/21) and MODIS, with brightness, confidence and fire radiative power.

    API key required
    Update frequency
    Near real time, roughly every 3 hours per satellite overpass
    Coverage
    Global
    Marked stale after
    6 hours
    Endpoint
    https://firms.modaps.eosdis.nasa.gov/api/area/csv/
    Licence and terms
    NASA open data. Free API key required (MAP_KEY).
    Environment variable
    NASA_FIRMS_MAP_KEY

Radar

  • RainViewer Weather Maps

    Composited precipitation radar tiles with past frames and short-range nowcast frames, for the radar animation.

    No key required
    Update frequency
    Every 10 minutes
    Coverage
    Countries with public radar networks (North America, most of Europe, Japan, Australia and others). No global coverage.
    Marked stale after
    30 minutes
    Endpoint
    https://api.rainviewer.com/public/weather-maps.json
    Licence and terms
    Free tier permits non-commercial use with attribution

Multi-hazard and basemap

  • NASA EONET (Earth Observatory Natural Event Tracker)

    Curated natural events - wildfires, volcanoes, severe storms, floods, landslides - used as the wildfire fallback when no FIRMS key is configured.

    No key required
    Update frequency
    Several times daily
    Coverage
    Global
    Marked stale after
    1 days
    Endpoint
    https://eonet.gsfc.nasa.gov/api/v3/events
    Licence and terms
    US Government public domain

  • GDACS - Global Disaster Alert and Coordination System

    Multi-hazard alerts (earthquake, tropical cyclone, flood, volcano, drought, wildfire) with green/orange/red impact scoring, operated by the European Commission JRC and UN OCHA.

    No key required
    Update frequency
    Continuous, typically within 30 minutes of an event
    Coverage
    Global
    Marked stale after
    3 hours
    Endpoint
    https://www.gdacs.org/gdacsapi/api/events/geteventlist/SEARCH
    Licence and terms
    Free reuse with attribution to GDACS / European Commission JRC

  • OpenStreetMap / Carto basemap tiles

    Raster basemap underneath every map view.

    No key required
    Update frequency
    Continuous
    Coverage
    Global
    Marked stale after
    365 days
    Endpoint
    https://basemaps.cartocdn.com/
    Licence and terms
    Map data (c) OpenStreetMap contributors, ODbL. Tiles by CARTO, CC BY 3.0.

Location search

  • Open-Meteo Geocoding API

    Location search and reverse lookup for city, region and country names.

    No key required
    Update frequency
    Static dataset, refreshed periodically upstream
    Coverage
    Global (GeoNames derived)
    Marked stale after
    30 days
    Endpoint
    https://geocoding-api.open-meteo.com/v1/search
    Licence and terms
    CC BY 4.0 (GeoNames CC BY 4.0)

  • BigDataCloud Reverse Geocoding (client API)

    Turns the coordinates returned by the browser Geolocation API into a city and country name for the "Locate me" feature.

    No key required
    Update frequency
    Static dataset
    Coverage
    Global
    Marked stale after
    30 days
    Endpoint
    https://api.bigdatacloud.net/data/reverse-geocode-client
    Licence and terms
    Free client-side API, no key required; attribution appreciated

How we handle this data

We relay, we do not author

Warning text, instructions, alert levels and activity notices are reproduced as the issuing agency published them. This site never writes, upgrades, downgrades or infers a warning.

Model output is labelled as model output

Forecast-derived risk indicators, river-discharge forecasts and model comparisons are calculated from numerical data and are always presented in separately marked blocks, with the exact threshold or method stated. They are never mixed in with official warnings.

Failures are shown, not hidden

If a source cannot be reached, the affected panel says “data temporarily unavailable” and reports when that source last responded. We never substitute placeholder values, and an unreachable feed is never rendered as a count of zero.

Age is always visible

Every page states how old its data is. For feeds that publish continuously, that is the source’s own timestamp. For feeds that publish only when an event occurs (volcano notices, tsunami bulletins), we show when we last checked, because a long quiet period is normal and should not read as stale data.

Keys stay on the server

Provider API keys are read only inside server-side API routes. No private key is ever included in JavaScript sent to the browser.