About SafeNow

Your Local Emergency Lifeline. Right Here. Right Now.

Technical Features

Zero JavaScript	Pure server-rendered HTML. Works with any browser, no dependencies.
<10KB Pages	Works on 2G networks, mesh relays, and satellite connections.
Sub-100ms Response	Live API data cached intelligently with traffic-aware expiration.
6 Real-Time Sources	FEMA, NWS Weather, NWS Alerts, USGS Earthquakes, Open-Meteo AQI, Environment Canada.
Bilingual	French/English for Quebec. Full support for Canadian emergency services.
Single C File	~2800 lines. No frameworks. Dependencies: curl, jansson only.
Visual Severity	🔴 Extreme \| 🟠 Severe \| 🟡 Moderate - Instant threat assessment.

Performance Monitoring

Metrics Tracked	api_time, render_time, total_time, cache_hits, api_calls
Thread-Local	Per-request performance tracking without locking overhead
Footer Display	Every page shows: total_ms (api:Xms cache:N)
Cache Strategy	30min normal, 5min high-traffic (10+ visits/30min)
Target Latency	<1ms static, <100ms with API fetch

Data Sources (All Free, No Auth)

API	Data	Refresh
FEMA v2	Disaster declarations, recovery centers	30 min
NWS	Weather conditions (api.weather.gov/points)	30 min (5 min high traffic)
NWS	Severe weather alerts (api.weather.gov/alerts)	30 min (5 min high traffic)
USGS	Earthquakes M2.5+ within 500km	30 min
Open-Meteo	Air Quality Index (US EPA), Canada weather	30 min
Environment Canada	Canadian weather alerts (dd.weather.gc.ca)	30 min

Design Philosophy

Text-First: No images, no CSS, no fonts. Semantic HTML only.
Offline-Ready: Save any page and it works without internet.
Low Bandwidth: Entire page under 10KB. Chunked navigation under 1KB.
Actionable: Emergency numbers, evacuation tips, survival checklists.
Hyperlocal: City/county level data with point-specific weather and alerts.

Coverage

USA: All 50 states + DC + PR. 200+ cities. 150+ rural counties.
Canada: All 13 provinces/territories. 50+ cities. Full bilingual Quebec support.

Active Emergencies

30+ emergency types with cached precautions:

🌀 Hurricane	🌪 Tornado	⛈ Thunderstorm	🌊 Flood/Tsunami
❄ Winter Storm	🧊 Ice Storm	🔥 Fire/Wildfire	🌋 Earthquake
🥶 Extreme Cold	☀ Heat/Drought	💨 High Wind	☣ Chemical/Bio

CLI Commands

./safenow 8080           # Start server
./safenow cache-status   # Cache statistics
./safenow cache-clear    # Clear cache
./safenow check          # Requirements check
./safenow test           # Smoke tests

Build It Yourself

sudo apt install libcurl4-openssl-dev libjansson-dev
gcc -O3 -o safenow src/server.c -lpthread -lcurl -ljansson -lm
./safenow 8080

Source on GitHub