The Marshall Fire in Colorado severely impacted indoor air quality in surviving homes.

The study found that residents experienced various symptoms like headaches and sore throats, attributed to poor air quality returning to their homes after the fire. Measurements revealed high levels of hazardous gases, including volatile organic compounds (VOCs) and heavy metals, inside these homes. These contaminants originated from the burning of nearby houses, releasing harmful chemicals into the air.

While the long-term health effects remain uncertain, the study emphasizes the need for precautions when returning to smoke-damaged homes, such as wearing masks and using air filters. The research highlights the importance of developing guidelines for safe re-entry and addressing the long-term consequences of such events.