Toxic pollution persists after Los Angeles wildfires devastate communities

As Los Angeles residents return to neighborhoods scarred by recent wildfires, experts warn that toxic ash and chemical residues from burned homes, vehicles and infrastructure pose ongoing health and environmental risks.

Amudalat Ajasa and Ruby Mellen report for The Washington Post.

In short:

• Wildfires in Los Angeles have burned more than 40,000 acres, releasing pollutants from materials like lead pipes and fireproofing into the air and soil.
• Hazardous particles such as soot and volatile organic compounds (VOCs) can infiltrate homes, affecting indoor air quality and increasing the risk of respiratory and cardiovascular issues.
• Contamination from ash and damaged infrastructure could affect water systems, with experts urging residents to avoid drinking untreated water due to potential chemical exposure.

Key quote:

“The ash itself contains a lot more toxic chemicals than if it was just a forest burning.”

— Rima Habre, professor of environmental health and spatial sciences at the University of Southern California

Why this matters:

Urban wildfires destroy more than vegetation — they burn buildings, vehicles and household items, releasing harmful toxins that can linger in air, soil and water. Long-term exposure to these pollutants poses serious health concerns, especially for vulnerable groups and raises questions about disaster preparedness in urban sprawl areas.

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