article: Emergency communication system
links: Amateur radio Emergency Ambulance Iwate Prefecture Cellular phone Uninterruptible power supply Tornado Alley Prefectures of Japan Tokyo Electric Power Company 2012 Aurora shooting Firefighter Fukushima Daiichi Nuclear Power Plant Miyagi Prefecture London Assembly Saffir-Simpson Hurricane Scale Shortwave radio London Joplin, Missouri NOAA Fujita scale Virginia Tech massacre Japan Virginia Polytechnic Institute and State University NYPD Email Fukushima Prefecture Siren (noisemaker) Hurricane Katrina Aldgate tube station National Weather Service London Underground GPS Internet Tropical cyclone Federal Emergency Management Agency Radio Sendai 9/11 NHK Property New Orleans Ethernet Facebook Nuclear power RSS Nuclear meltdown Power over Ethernet Transport for London 7 July 2005 London bombings Japan Meteorological Agency Twitter Vodafone Light-emitting diode High-definition video