How do I clean a gas fire pit or outdoor fireplace after a haboob?

Phoenix Fireplace & Chimney · November 6, 2026

Why dust storms hit outdoor fire features so hard

The National Weather Service describes a haboob as an intense dust storm that can be lofted about 1,500 meters high, arriving as a wall of dust. An NWS technical memo says these storms reach Sky Harbor a few times a year on average, and they tend to come early in the monsoon season, which the NWS counts from June 15 to September 30.

A fire pit is an open bowl sitting in the yard. When a dust wall rolls through, fine silt settles into the media, sifts down into the burner pan, and coats the igniter and the flame sensor. Outdoor fireplaces collect it in the firebox and on the log set. Because most Valley owners don't light their outdoor gas features again until fall, that dust sits there for weeks or months, often joined by leaves, palm fiber and insects.

Step by step after the storm

Wait until the storm and any rain have passed. Work with the gas off at the valve or the propane tank, and with the burner cool.

• Remove the media. Scoop out fire glass, lava rock or ceramic pieces into a bucket.
• Rinse the media with a hose in a strainer or a mesh bag, then spread it on a tarp in the sun until it is completely dry. Wet lava rock can trap moisture, and wet media over a hot burner is not something to rush.
• Brush the burner. Use a soft brush or a shop vac on low to lift dust off the burner ring or pan and out of the ports. Don't force wire or pins into ports; that can widen them and change the flame.
• Clear the air openings. Many burners have an air mixer or intake below the pan. Silt and spider webs there are a common cause of a lazy yellow flame.
• Blow out the igniter and pilot area gently, and wipe the flame sensor or thermocouple tip with a dry cloth.
• Check the enclosure. If the pit hides a propane tank, make sure its vent openings are not blocked with dust or debris.
• Put the media back in a single, even layer. Piling it too deep over the burner chokes the flame.

Outdoor fireplaces and fire tables

An outdoor gas fireplace usually has a log set or a burner tray inside a masonry or stucco box. Lift the logs out in the order they came, take a photo first, and brush the burner and ember material. Putting logs back in the wrong spots is one of the most common reasons a fire looks thin or smokes the face of the box afterward.

Fire tables with a glass wind guard need the glass wiped and the gap at its base cleared, because dust packs into that channel.

Signs the dust went deeper than you can reach

Sometimes cleaning the surface is not enough. Silt can get into the gas valve area, the orifice or the electronic ignition module, especially on a pit that sat through more than one storm.

• It clicks or sparks but won't catch, even after cleaning.
• The flame comes up small, uneven or yellow and leaves soot on the media.
• It lights and then goes out after a minute.
• You smell gas while the burner is off. In that case, leave the area and call Southwest Gas at 1-877-860-6020 from a safe place.

What we do on a fire pit visit

Our burner diagnosis is free: we pull the media, light and test the burner, and look at the igniter, sensor, valve and air intake. Any repair is priced at the diagnosis. If the pit is past saving, HomeGuide's 2026 guide puts a new gas fire pit installed at $3,500 to $8,000, so it pays to keep the one you have running. A simple fitted cover, put on whenever a dust storm warning comes out, saves a lot of this work.