Recent measurements reveal alarming levels of toxins in the air during the Los Angeles wildfires, highlighting the dangers of urban blazes exacerbated by climate change and development.
Soaring Toxins in Los Angeles Wildfires: The New Risks

Soaring Toxins in Los Angeles Wildfires: The New Risks
As wildfires rage in urban areas, researchers warn of significant airborne toxins due to the burning of structures.
In a concerning revelation during the ongoing Los Angeles County wildfires, atmospheric scientists have detected dangerously high concentrations of airborne toxins. Measurements taken from Pico Rivera, approximately 11 miles from the flames, show lead levels spiking to 100 times their average and chlorine reaching 40 times normal levels, as reported by The New York Times. These pollutants are especially alarming since lead, a known neurotoxin, is often found in older homes' paints and plumbing, while chlorine is released during the combustion of plastics and other materials.
Haroula Baliaka, a Ph.D. candidate in atmospheric chemistry at California Institute of Technology, emphasized the urgency of the findings, stating these incidents are a distressing reminder that urban wildfires are different from their rural counterparts. They are fueled not just by vegetation but by the very materials used in urban construction and human habitation. The implications for public health are grave; inhalation of high lead levels could have devastating effects on the nervous systems of vulnerable groups, particularly children. The levels observed during these fires exceeded the safety limits set by the Environmental Protection Agency by more than three times.
The rising toxicity of wildfire smoke poses significant risks, leading to respiratory illnesses and cardiovascular issues. A previous study highlighted the potential for wildfires to have caused approximately 12,000 premature deaths in California during the devastating Camp Fire in 2018. Scientists now warn that the situation is eroding progress made in reducing air pollution from vehicles and industry.
These troubling statistics come from the ASCENT network, a federally funded initiative launched last year to monitor air quality in real-time across the nation. The emphasis on urban wildfires and their unique toxic components, as noted by principal investigator Nga Lee Ng of Georgia Institute of Technology, underscores the need for urgent public health measures.
In light of this evidence, experts suggest that communities must be prepared for the escalating health risks associated with urban wildfires, highlighting the need for expanded monitoring and preventive measures.
Haroula Baliaka, a Ph.D. candidate in atmospheric chemistry at California Institute of Technology, emphasized the urgency of the findings, stating these incidents are a distressing reminder that urban wildfires are different from their rural counterparts. They are fueled not just by vegetation but by the very materials used in urban construction and human habitation. The implications for public health are grave; inhalation of high lead levels could have devastating effects on the nervous systems of vulnerable groups, particularly children. The levels observed during these fires exceeded the safety limits set by the Environmental Protection Agency by more than three times.
The rising toxicity of wildfire smoke poses significant risks, leading to respiratory illnesses and cardiovascular issues. A previous study highlighted the potential for wildfires to have caused approximately 12,000 premature deaths in California during the devastating Camp Fire in 2018. Scientists now warn that the situation is eroding progress made in reducing air pollution from vehicles and industry.
These troubling statistics come from the ASCENT network, a federally funded initiative launched last year to monitor air quality in real-time across the nation. The emphasis on urban wildfires and their unique toxic components, as noted by principal investigator Nga Lee Ng of Georgia Institute of Technology, underscores the need for urgent public health measures.
In light of this evidence, experts suggest that communities must be prepared for the escalating health risks associated with urban wildfires, highlighting the need for expanded monitoring and preventive measures.