Raleigh Convention Center is on fire

Why would you believe the HVAC might be the root cause?
Just thinking of ignition sources. Big buildings typically have their HVAC units on their roof. A fire needs an ignition source and where there are moving parts, belts, circuit breakers, etc there are things that can ignite when they aren't operating properly. Other common causes of roof deck fires IMO are attributed to people working on the roof (i.e. discarded cigarettes or workers using heat when laying tar on some roofs, sometimes welding or saws creating sparks, etc), but since this fire was at night that wasn't the first thing that jumped to my mind.
 
Just thinking of ignition sources. Big buildings typically have their HVAC units on their roof. A fire needs an ignition source and where there are moving parts, belts, circuit breakers, etc there are things that can ignite when they aren't operating properly. Other common causes of roof deck fires IMO are attributed to people working on the roof (i.e. discarded cigarettes or workers using heat when laying tar on some roofs, sometimes welding or saws creating sparks, etc), but since this fire was at night that wasn't the first thing that jumped to my mind.

Rooftop solar arrays can also be a problem…even at night.
 
From the Raleigh Downtown Facebook page.

Last night’s fire at the Raleigh Convention Center could have been far worse if not for the swift response of our first responders.

All events scheduled for this week — including the North Carolina AI & Cybersecurity Symposium and the 2025 NCHSAA Cheerleading Invitational — have been postponed.

We’ll share updates as soon as the RCC is ready to reopen for events.

🔥 Fire reported Monday evening at 9:30 pm on December 1
🔥 RFD Downtown Station 1 first to respond with 2 minutes
🔥 Fire confined to rooftop
🔥 Fire caused by gas line to HVAC
🔥 50+ firefighters on scene
🔥 Fire contained in 30 minutes
🔥 No events at the time
🔥 No injuries - onsite security quickly evacuated
🔥 Estimated $2M in damages to roof and equipment
🔥 No interior damage

📷: CBS 17
 
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