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  2. Siren (alarm) - Wikipedia

    en.wikipedia.org/wiki/Siren_(alarm)

    For example, pull box number 233, when pulled, would trigger the fire horn to sound two blasts, followed by a pause, followed by three blasts, followed by a pause, followed by three more blasts. In the days before telephones, this was the only way firefighters would know the location of a fire.

  3. Cupola - Wikipedia

    en.wikipedia.org/wiki/Cupola

    The term cupola can also refer to the protrusions atop an armoured fighting vehicle due to their distinctive dome-like appearance. They allow crew or personnel to observe, offering very good all round vision, [9] or even field weaponry, without being exposed to incoming fire. Later designs, however, became progressively flatter and less ...

  4. Hacks at the Massachusetts Institute of Technology - Wikipedia

    en.wikipedia.org/wiki/Hacks_at_the_Massachusetts...

    Full-size "MIT Fire Department" fire truck placed Dome Presumed to commemorate the fifth anniversary of the September 11, 2001 attacks. The logo painted on the truck's sides featured the two figures from the MIT seal dressed as firemen, along with the motto MEMINIMUS ("We remember"). [110] 28 Feb 2006 Torino Olympic medal placed on dome

  5. Civil defense siren - Wikipedia

    en.wikipedia.org/wiki/Civil_defense_siren

    Communities with volunteer fire brigades use a continuous note on all sirens for civil defense, and a warbling siren on the fire station siren only for fire callouts. Civil defense uses a distinctive "sting" siren that is used by all radio stations nationwide, but is currently only used for civil defense sirens in Wanganui.

  6. Air horn - Wikipedia

    en.wikipedia.org/wiki/Air_horn

    Thus, an outstretched hand reaching upward and pumping is a signal to the driver of an air horn equipped vehicle, requesting a toot. In modern trucks and buses, the horn is actuated by a button on the steering wheel (just like a normal car horn). Some trucks and buses have both electric and air horn, selectable by a switch on the dashboard.

  7. What is a heat dome, and how can it create 'ring of fire ...

    www.aol.com/weather/heat-dome-create-ring-fire...

    A heat dome is a sprawling area of high pressure that promotes hot and dry conditions for days or weeks at a time. "Heat domes are a lot like a balloon," AccuWeather Senior Meteorologist Alan ...

  8. Climate change supercharged a heat dome, intensifying 2021 ...

    www.aol.com/news/climate-change-supercharged...

    North America's 2021 fire season, including massive Northern California blazes, was made worse by a supercharged heat dome. What did the supercharging? Climate change.

  9. Air-supported structure - Wikipedia

    en.wikipedia.org/wiki/Air-supported_structure

    Air-supported dome used as a sports and recreation venue. An air-supported (or air-inflated) structure is any building that derives its structural integrity from the use of internal pressurized air to inflate a pliable material (i.e. structural fabric) envelope, so that air is the main support of the structure, and where access is via airlocks.