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Firewise on the Farm

  • 11/1/2022 1:46:00 PM
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AMES - As Iowa’s annual harvest wraps up across the state, the Iowa Department of Natural Resources (DNR) encourages farmers to get reacquainted with fire prevention practices to keep the farm ‘firewise.’

This has been an extended drought year, particularly in the western part of the state. The following simple steps for a safer harvest can save time and money.  

  • Properly prepare machinery to reduce the chance of a field fire from an overheated bearing (check the manufacturer’s recommendations). A spark from an improperly lubricated combine can instantaneously ignite dry plants and field debris.

Check that all fire extinguishers carried on the machinery are fully charged with loose powder inside. If the powder is not loose, remove the extinguisher from its bracket then thump the canister with a rubber hammer until the powder moves when shaken. 

Make sure the size of the extinguisher is appropriate for the size of the machinery. You may need larger and/or additional extinguishers. Also make sure you have the correct extinguisher for the type of fire to be extinguished. There are two types of extinguishers, the powder extinguisher for electrical and petroleum-based fires and the water extinguisher for vegetative fires. You may need to carry both kinds of extinguishers.

  • Keep equipment clean. Check and remove combustible harvest debris from motors, exhausts, ledges and brackets several times a day. A portable gas-powered leaf blower is great for blowing debris from the various surfaces of the combine.
  • Service grain storage and drying equipment. Storage facilities are like your bank vault. Protect their contents by properly servicing all bearings, belts, motors and drags. Dryers frequently cause fires, so before drying grain have a qualified service technician perform the necessary maintenance. Keep weeds mowed around the facilities to discourage a fire from spreading. All extinguishers should be handy, fully charged, and the proper size and type for the area. 
  • Turn off interior lighting in overfilled bins. A grain fire will start if the grain surrounds the bulb. Turn off the light’s breaker to avoid accidentally turning the light on. This also applies to hay storage facilities.
  • Handle hay properly. Improper hay storage commonly causes or complicates farm fires. Preventative measures greatly reduce this risk.

Planning proper hay storage is crucial. Store hay away from combustibles such as gasoline, fertilizers and pesticides, as well as open burning areas like burn barrels, brush piles and vegetative burning. Arrange round bales in groups of 10 or fewer and place at least 100 feet away from structures. Leave 30 feet of mowed grass, bare ground or rock between the bale groups, creating a solid fire break.

Many hay fires occur by spontaneous combustion of moist hay, usually within six weeks after baling. Plan to bale hay at its driest stage and do not bale in the morning dew or too soon after a rain.

Check stored hay frequently for hot hay or an internal hay fire. Be aware of a caramel or strong burning odor, a visible vapor or smoke, a strong musty smell, and/or hay that is hot when touched. If any of these occur, call the fire department immediately and do not move the hay. Moving it exposes overheated or smoldering hay to oxygen, speeding the fire.

  • When tilling in the fall, till a 30 foot break around building sites, remote bin sites and outside storage facilities to minimize fire spread, and around fields if there is excess fine fuels in the area.  Remove weeds and other combustibles around structures and stored equipment.
  • If a fire occurs, remain calm, call 911 immediately. Provide clear, concise directions to your location. Many field and bin sites do not have 911 addresses, so be prepared to identify an intersection or landmark to direct responders.

To help control field fires until firefighters arrive, remain calm and act swiftly. Quickly disk a fire break approximately 15 feet wide around the fire. Be cautious when doing this as smoke will starve and stall a motor and will make hazards and bystanders difficult to see. To assist with a structural fire, make sure there are no flammable objects nearby and if the circuit panel is safely accessible, turn off the building's electricity. If time allows, evacuate any livestock to a distant pasture. If possible, spray high-pressure water on any surrounding vegetation or structures, discouraging spreading embers. Do not take risks.

After using any equipment to fight a fire, check air filters, ledges, nooks and crannies for burning debris. For more detailed information, visit

Remember, in a fire emergency, call 911 immediately. Do not wait until all your means of fighting the fire are exhausted. Every minute impacts your losses.