(St Florian is the Patron Saint of Fire Fighters and Paramedics, "Saint Florian's School" is the slang term for the Fire Academy in many cities, "teaching brothers" and "teaching fathers" is a slang term for Fire Academy instructors who haven't fought a fire in years)
The official party line - from St. Florian's School - which is right for "contained" trash fires and copier fires -
1. Go two floors away from the "fire floor" - which is usually good advice for an electrical fire in a copier or a paper fire in a trash receptacle. But not for a major act of terrorism/sabotage.
2. Use the fire proof fire escapes --again, usually good advice for an electrical fire in a copier or a paper fire in a trash receptacle. But not for a major act of terrorism/sabotage.
Being "connected" - staying "connected" when the electricity and LAN go out-
1. Get an inexpensive battery powered scanner.
2. Your public safety people - fire and EMT and unencrypted police -work the 150.00-159.99 MHz band (police - encrypted and unencrypted - also use the 440 MHz and the 900 MHz bands). Most scanners pick up those bands.
3. Most scanners also pick up TV audio (not cable - just broadcast), AM radio, and FM broadcast radio.
4. Set your scanner for fire dispatch, fire high rise "working", fire "working" for your neighborhood (usually on your FD's web site), your local "all news" radio station, audio of your "all news" broadcast TV station.
Issues at 9/11 involved "repeaters" that were not turned on and "frequency management."
The "Deputy Chief" and the "Communications Chief" in our local FD (city of 2 million) have kicked butt and taken names on these issues locally. But - people are human - I keep my scanner on "Fire Dispatch" 24 by 7 and run "fire drills" at work and at home.