In an instance like this, the best tarps to have on hand are fire retardant tarps. While nearly all polyethylene tarps are treated to be waterproof and UV resistant, not all are fire retardant. For a tarp to be considered fire retardant, it needs to meet certain specifications set by California fire codes, which are the strongest in the United States. As many tarps are used outdoors, including as canopies in carnivals and fairs where food is being served, having that additional protection will keep the tarp –as well as those protected by it – from burning or being damaged by fire.

Not all tarp retailers carry these tarps, but others, such as A1 Tarps, offer fire retardant tarps in their selection of products. Essentially, these types of tarps have all the typical properties of polyethylene tarps, including being waterproof, UV resistant, and mildew and rot resistant, and being fire retardant is added to this list of features. A tarp, however, to be fire retardant needs to have a tag or sticker on the side stating that the tarp is certified under the California State Fire Marshall. Otherwise, the tarp will not be as strong in this aspect.