About Kalamidad: Philippines Disaster Map

Kalamidad is a free, real-time Philippines disaster map that tracks earthquakes, typhoons, volcanic activity, wildfires, and floods on a single live dashboard. It pulls from seven independent data sources, normalizes everything into a unified severity-scored feed, and refreshes every 15 minutes. No ads, no paywall, no login.

00 . specsWhat does Kalamidad track, and how often?

Kalamidad polls seven public hazard feeds every 15 min, filters every event to the Philippine geographic boundary, scores it on a four-tier severity scale, and serves the result as a single live map. The operating specifications below are the same values the pipeline runs on.

01 . why this existsA calm signal in a noisy emergency

The Philippines gets hit by an average of 20 typhoons per year and sits on the Pacific Ring of Fire. When disaster strikes, people scramble across PAGASA, PHIVOLCS, USGS, and social media for updates. Kalamidad consolidates those sources into one Philippines disaster map with a four-tier severity system so you can see what matters in one place.

It was built by Zedlav as a public-good utility for the Filipino community. It is deliberately not a news site, not a forecast, and not an alerting authority. It is a fast, honest view of the public data, with a plain-language read on what each event means, and a perimeter tool to filter by distance from where you are.

02 . data sourcesSeven public feeds, one boundary

Every source is filtered to the Philippine geographic boundary (116.9-127E, 4.5-21.5N), normalized into a single event shape, and scored for severity. Attribution stays with each originating agency.

• USGS (United States Geological Survey) -- earthquake data via the FDSNWS API. Magnitude 2.0+ events with depth, felt reports, community intensity, Modified Mercalli, alert level, tsunami flag, and review status.
• NASA EONET (Earth Observatory Natural Event Tracker) -- active volcanic events, wildfires, and severe storms detected by satellite imagery. Multi-geometry support for events that move over time.
• GDACS (Global Disaster Alerting Coordination System) -- multi-hazard alerts with three-tier severity scoring (green, orange, red) for earthquakes, tropical cyclones, floods, droughts, wildfires, and volcanic eruptions.
• NASA FIRMS (Fire Information for Resource Management System) -- near-real-time fire hotspot detection from VIIRS NOAA-20 and MODIS satellite instruments. Brightness temperature, fire radiative power, and detection confidence per hotspot. Because satellite passes can return dozens of detections at once, fire hotspots are hidden from the default map view to keep the display readable. Use the Fire filter chip to view them.
• PAGASA (Philippine Atmospheric, Geophysical and Astronomical Services Administration) -- Philippine typhoon bulletins and tropical cyclone signal warnings. Parsed from the official severe weather bulletin page during active storms.
• PAGASA CAP Alerts -- General Flood Advisories, thunderstorm advisories and watches, and rainfall advisories via the PAGASA Common Alerting Protocol API. Province-level affected areas with river basin details and precautionary guidance.
• Open-Meteo -- current precipitation data for 26 monitoring stations across the Philippines. Free weather API, no authentication required.

03 . hazard typesSeven event categories

04 . severityFour tiers, color means data, never decoration

Severity is the only thing that carries color on Kalamidad. Everything else stays monochrome, so a red marker always means one thing: pay attention.

Severity colors appear on map markers, event cards, and the detail view. Critical events pulse on the map and trigger the alert banner. Impact radius estimates are approximate, based on magnitude, wind speed, or fire intensity.

"Severity is the only thing that carries color on Kalamidad. A red marker always means one thing: pay attention." - Kalamidad severity rule, published August 2026

"Impact radii are rough estimates based on magnitude, wind speed, or fire intensity. They indicate potential reach, not confirmed damage zones." - Kalamidad operating rule, published August 2026

05 . how it worksA serverless pipeline that costs nothing to run

The architecture runs entirely on the Cloudflare free tier with no traditional server. A Cloudflare Worker fires every 15 minutes, fetches data from seven public APIs (USGS FDSNWS, NASA EONET, GDACS RSS, NASA FIRMS CSV, PAGASA HTML, PAGASA-CAP, and Open-Meteo), filters to the Philippine bounding box (116.9-127E, 4.5-21.5N), normalizes each event into a unified schema, scores severity, and writes the result to Cloudflare R2 object storage. The frontend is a static site on Cloudflare Pages that polls the Worker endpoint every 30 seconds.

No framework, no build step, no database. The entire frontend is vanilla HTML, CSS, and JavaScript. Fonts are self-hosted. The location search runs against a bundled 162-city Philippine gazetteer with no external geocoding API. Impact radii and affected-city lists are computed client-side using haversine distance.

Source selection criteria. A feed qualifies for inclusion only if it meets four criteria: public access without a paid license, a machine-readable response format, a documented update cadence, and coverage that includes Philippine territory. Social media posts, news aggregators, and crowd-reported sightings are excluded, because none of them carry a verifiable timestamp and coordinate pair. Attribution stays with the originating agency in every case.

Severity scoring methodology. Severity is not averaged across sources. Each hazard is scored against the scale its own agency already publishes: USGS magnitude bands for earthquakes, PAGASA tropical cyclone wind signal numbers for typhoons, GDACS green, orange and red for multi-hazard alerts, FIRMS detection confidence for fire hotspots, and hourly accumulation thresholds for rainfall. Those native scales are then mapped onto one four-tier vocabulary, so a red marker means the same thing regardless of which agency reported it. The complete mapping is published in machine-readable form at /llms.txt.

Known limitations. PAGASA typhoon bulletins are parsed from the agency's public HTML bulletin page, so a change to that page layout can interrupt typhoon coverage until the parser is updated. Satellite-derived sources report on orbital pass schedules, which introduces a 1 hr to 3 hr lag on fire and volcanic detections. Impact radii are geometric estimates, not modeled damage footprints. When a feed fails, that source contributes an empty result for the cycle rather than replaying its previous payload, so a quiet map means a quiet feed, never a stale one.

06 . built withThe full stack

Total infrastructure cost: $0/month. The entire stack runs within Cloudflare's free tier limits. No server provisioning, no database, no third-party SaaS dependencies beyond the data source APIs themselves.

07 . proximityHow close is it to me?

Search a city or province, or use your device location, and Kalamidad drops a marker and draws an adjustable perimeter ring on the map. Slide the radius from 25 to 500 km and the feed re-sorts by distance, dims everything outside your ring, and tells you exactly how many events (and how many high/critical) fall inside it. It is the fastest way to turn a national map into a personal one.

Distance calculations use the haversine formula against a bundled 162-city Philippine gazetteer covering all 17 administrative regions including BARMM, from Metro Manila to Batanes. No external geocoding API needed.

08 . coverageBatanes to Tawi-Tawi

Kalamidad covers the entire Philippine archipelago from Batanes (20.4N) to Tawi-Tawi (5.0N), spanning 116.9E to 127E longitude. Events outside this boundary are excluded. The location search covers 162 cities and municipalities from Metro Manila to the BARMM region.

09 . faqWhat do people ask about Kalamidad?

10 . disclaimerImportant

Built by Zedlav on a zero-cost Cloudflare serverless stack. Kalamidad is a working demonstration of cross-API data aggregation, real-time geospatial visualization, and cron-driven pipelines.