A cranky old radiator in an Upper East Side prewar walk-up turned a second-floor apartment into a scalding steam room, and the whole thing ended up online. A viral video shows the heater suddenly gushing boiling water and steam until FDNY firefighters step in and shut it down, transforming a routine building emergency into must-watch internet chaos.
The tenant captured the moment the valve gave out and the room filled with hot mist, while neighbors and online onlookers watched FDNY crews work through the fog to make the place safe. As the firefighters move in to cut the flow, the clip keeps climbing in views.
Sam Souder, 27, told the New York Post that before the blowout, the radiator "was shaking and pulsating and leaking and it was really loud. like it was just angry." She said a valve "flew off" and unleashed a rush of boiling water. Souder told the Post she called the FDNY because she was getting burned and that firefighters shut "a valve on the bottom that cuts the water." The Post reports that the clip she posted to Instagram has pulled in more than 9 million views.
How old radiators can fail
Heating-system specialists note that older steam and hot-water setups can trap condensate and create violent pressure surges, often called "water hammer." The result is loud banging in the pipes and serious stress on valves. When vents are clogged or a valve gets opened and closed too quickly, trapped steam and condensate can slam into each other and send shock waves through the system that can knock fittings loose or push a valve past its breaking point. This phenomenon, along with practical troubleshooting steps, is detailed by InspectApedia, a technical resource on building-system failures.
FDNY response and a reminder for tenants
According to the New York Post, FDNY crews twisted the shutoff at the base of the radiator to stop the overflow, and building maintenance later came in to repair the failed fitting. The building’s maintenance worker told the Post that the malfunction may have been made worse by someone repeatedly turning the radiator on and off, a bad habit that can put extra strain on aging valves. The whole episode, complete with firefighters wading through a cloud of steam, is a pointed reminder that cast-iron radiators and century-old valves need regular attention and gentle handling.
What to do if your radiator goes rogue
If your own radiator ever starts spewing boiling water or heavy steam, get out of the immediate area fast and close doors behind you to keep the steam from spreading. Call 911 if anyone has been burned or if the situation seems dangerous, then alert your building superintendent or landlord as soon as possible. Skip the temptation to tighten, loosen, or otherwise fiddle with pressurized valves yourself. Old radiators and their controls should be checked and repaired by a licensed heating contractor or plumber.
For now, the viral clip stands as a steamy cautionary tale. Old-school New York radiators still keep plenty of apartments toasty, but when something goes wrong, it can get dramatic and dangerous in a hurry. Tenants in older buildings are better off playing it safe and getting any suspicious heating hardware inspected before their living room stars in the next internet spectacle.
