Baltimore Sun: Historic State House dome drenched in “deluge” fire suppression test

The deluge system is a fixed fire protection system that releases pressurized water through a pipe system on the outside of the State House Dome. If the detectors or the deluge wiring, more specifically a device called the Pyrowire, detects excessive heat or smoke the system will automatically activate.

For video please see link below:

https://www.baltimoresun.com/ac-cn-deluge-test-standalone-20190712-sm45pqtmlbblbnwatzf7l5xw3m-story.html