From Dan, Senior Damage Assessor at First Call Restoration
Most folks think grill fires start on top of the grates. Truth is, it’s what’s underneath that gets them.
I was out in Shawnee a few weeks back. A couple hadn’t cleaned their drip tray in a few seasons. Grease built up like tar and when it finally lit, it went up fast. Flames rolled over the back patio and caught their vinyl siding before they even grabbed the hose.
Grease fires burn hotter than you think, and once they stick, they spread. Outdoor cushions, wood trim, even soffits don’t stand a chance.
If it’s been more than a couple uses since you cleaned your grill, do it now. Waiting until it “looks dirty” is how house calls like mine get scheduled.
Top Causes of Grease Fires on Gas Grills
-Built-Up Grease in Drip Trays
When drip trays are neglected, grease piles up like kindling. All it takes is one hot session to light it.
-Clogged Burners
Grease and food debris can block burner ports, leading to uneven flames or sudden flare-ups that ignite surrounding buildup.
-High Cooking Temperatures
Cooking fatty foods at high heat causes more grease to drip and vaporize, creating a fire-prone environment underneath the grates.
-Closed Lid with Active Flames
Trapped heat can raise the internal temperature beyond safe limits, especially if grease has pooled. When you open the lid, oxygen rushes in and feeds the flame.
-Lack of Regular Cleaning
Waiting until the grill “looks dirty” means you’ve already got a fire risk. Grease doesn’t have to be visible to ignite.
-Worn or Damaged Grill Parts
Rusted heat shields, cracked trays, or old burner covers can allow grease to hit open flames directly.
-Improper Shutdown
Turning off the burners but leaving hot surfaces under greasy buildup can still lead to delayed ignition.
Source: Besides Dan’s many years of restoration work and grilling of his own… Adapted from safety insights provided by Travelers Insurance.
LINK: https://www.travelers.com/resources/home/fire-safety/the-science-of-gas-grill-fires
