Is Beer Flammable? A Firefighter Answers

Whether you’re at a barbecue with open flames, sitting around a campfire, or just wondering about that case of beer in the garage near your water heater — the question makes sense. Beer has alcohol in it, and alcohol burns. So can beer catch fire?

Beer is not flammable. Most beers contain between 4% and 7% alcohol by volume (ABV), which works out to roughly 8 to 14 proof. That’s nowhere near enough alcohol to produce flammable vapors. A liquid generally needs to be at least 40% ABV (80 proof) to catch fire. Beer is mostly water with a small amount of alcohol, grains, hops, and yeast — none of which make it a fire hazard.

That said, there are a few related questions worth covering — like whether beer can explode, what happens when you throw beer on a fire, and whether any beers have enough alcohol to burn.

Why Won’t Beer Catch Fire?

It comes down to basic chemistry. For a liquid to be flammable, it needs to produce enough vapor at its surface to create an ignitable mixture with the surrounding air. This is measured by flashpoint — the lowest temperature at which a liquid produces enough vapor to ignite.

Beer’s alcohol content is so low that it can’t produce a combustible vapor concentration under any realistic conditions. Even if you heated beer to a boil, the small amount of alcohol would evaporate and disperse before it could reach a concentration that would ignite. The water in beer (roughly 93-96% of its volume) is the dominant factor, and water doesn’t burn — it puts fires out.

Can You Pour Beer on a Fire to Put It Out?

Technically, yes — beer is mostly water, and it will help cool a small flame. But it’s a terrible strategy. A 12-ounce can of beer isn’t going to do much against any fire larger than a match. You’d be far better off using a proper fire extinguisher, a bucket of water, or a fire blanket.

And never pour beer (or any liquid) on a grease fire. The water content will cause the hot grease to splatter and can cause a dangerous flare-up. For grease fires, smother the flame with a lid or use a Class B fire extinguisher. If you want to know more about putting out different types of fires safely, check out our article on whether baking soda can put out a fire.

What About High-ABV Craft Beers?

The craft beer world has pushed ABV levels higher than ever. Some imperial stouts and barleywines hit 12-15% ABV, and a handful of specialty beers — like freeze-distilled “extreme” beers — can reach 25% to 67% ABV. At those levels, the highest-ABV beers could theoretically produce flammable vapors.

But let’s be realistic — these extreme beers are rare, expensive, and come in small bottles. You’re not going to accidentally start a fire with a $40 bottle of 60% ABV freeze-distilled beer. Standard beer from the store — lagers, IPAs, stouts, wheat beers — is not a fire risk. Period.

If you’re curious where the flammable threshold actually falls across different types of alcohol, I cover it in detail in my article on what proof alcohol is flammable.

Can Beer Cans or Kegs Explode?

This is the more practical fire safety concern. Beer cans and kegs are pressurized containers, and like any pressurized container, they can rupture if exposed to enough heat.

• Beer cans in a fire: If cans are exposed to flame or extreme heat (like in a garage fire), the liquid inside will expand and the carbonation pressure will increase. Eventually the can will burst, spraying hot liquid and creating a minor shrapnel hazard. It’s not an explosion in the dramatic sense, but it can cause injuries and spread hot debris.
• Kegs in a fire: A standard beer keg is a more serious concern. A keg holds 15.5 gallons of pressurized liquid. In a structure fire, a keg exposed to sustained heat could fail violently. Firefighters are trained to be aware of pressurized containers in fire environments for exactly this reason.
• Cans in a hot car: Beer left in a hot car on a summer day can build enough pressure for the cans to burst, but this is a mess issue, not a fire hazard. The temperatures involved (130-170°F in a closed car) aren’t high enough to create any fire risk.

Beer and Fire Safety Tips

While beer itself isn’t flammable, the situations where people drink beer often involve fire hazards:

• Grilling and barbecues: The fire risk is the grill, propane, lighter fluid, and grease — not the beer. Keep flammable liquids away from open flames and never leave a grill unattended.
• Campfires: Don’t throw beer cans into a fire pit. They won’t explode dramatically, but the aluminum will melt, the residual liquid will spatter, and the coatings on the can produce toxic fumes.
• Garage storage: A case of beer in the garage isn’t a fire hazard. The cardboard packaging is more flammable than the beer. Just keep it away from your common ignition sources.

In short: drink your beer without worrying about it catching fire. Focus on the actual fire hazards around you — unattended cooking, faulty wiring, and overloaded electrical outlets cause far more fires than any beverage ever will.