When wildfire evacuation orders are lifted, returning residents often mistake “cleared to return” for “safe.” However, recovering from a wildfire requires careful navigation of hidden post-fire hazards. As seen following destructive blazes like the August 2026 fires in Spokane, Washington, three main areas require cautious attention before reoccupying or rebuilding.

        First, surviving buildings may hold toxins. Homes spared by flames can still harbor severe indoor contamination. Smoke, ash, and toxic chemicals enter through vents, windows, and HVAC systems, settling into carpets, walls, and ductwork. These contaminants can include dangerous heavy metals like lead and arsenic, asbestos, and volatile organic compounds (VOCs). Because these hazards cannot be identified by sight or smell, property owners should hire qualified professionals to inspect and test air and surfaces. If contamination is found, professional remediation and independent confirmation testing are essential before moving back in.

        Furthermore, drinking water may be chemically contaminated. A functioning tap offers a false sense of security. Fire-induced pressure drops can draw smoke and toxic debris into water networks, while extreme heat can melt plastic plumbing, leaching cancer-causing chemicals like benzene into the supply. Boiling water will not remove these chemicals and can actually increase exposure by releasing toxic vapors into indoor air. While utilities handle public infrastructure, property owners are responsible for testing their own plumbing, irrigation systems, and private wells. Stagnant water samples (typically resting in pipes for 72 hours) should be tested for VOCs, metals, and bacteria. Until safety is verified, residents should rely on bottled water for drinking, cooking, and bathing.

        Also, debris removal is only the first step. Clearing ash, damaged vehicles, and surface soil does not mean a property is automatically ready for rebuilding. Past wildfire studies show that up to 34% of cleared properties still contained dangerous soil contamination, such as heavy metals. Soil testing should be conducted by independent, board-licensed engineers or geologists before construction begins, and local environmental or health agencies should review the findings.

        Ultimately, safety cannot be judged by appearance or odor alone. Engaging licensed professionals to evaluate air, water, and soil is the safest path to a full recovery.

Internet: <https://theconversation.com> (adapted).