In brief
On 10 November 2026, fireworks and bonfires during Bonfire Night caused a sharp increase in air pollution across southeast England. The Met Office reported PM2.5 levels reaching a maximum of 10 on a 10‑point scale, with Hillingdon soaring to about 600 units. Health agencies warned that the soot could cause respiratory and cardiovascular problems.
On 10 November 2026, Bonfire Night celebrations in southeast England, especially London, triggered a surge in air pollution as fireworks and bonfires released fine soot particles into a stagnant atmosphere, Xinhua reported.
Xinhua quoted the Met Office, Britain’s national meteorological service, stating that the region’s fine particulate matter (PM2.5) levels climbed after the festivities, with a maximum score of 10 on a 10‑point scale and Hillingdon recording around 600 units on Monday. This spike was attributed to the high-pressure weather system that trapped pollutants close to the ground.
Sky News images showed heavy fog overlaying the soot, trapping the fine particles and preventing them from dispersing. The resulting fog‑soot mixture posed particular risks to people with asthma and heart disease, Sky News noted.
The World Health Organization recommends a 24‑hour average of no more than 15 units for PM2.5. Imperial College London scientists warned that the particles—30 times smaller than a human hair—can penetrate deep into the lungs, enter the bloodstream, and raise the risk of heart attacks and strokes.
Liz Bentley, chief executive of Britain’s Royal Meteorological Society, explained that the high-pressure system created stagnant conditions. “If we pop pollution into the atmosphere, whether that’s from cars, industries, fireworks, or bonfires, that pollution doesn’t go anywhere,” she said.
These findings highlight the intersection of traditional celebrations and environmental health. While Xinhua’s coverage emphasizes the quantitative rise in pollution levels, Sky News focuses on the visual impact of soot‑laden fog, and health warnings from WHO, Imperial College, and the Royal Meteorological Society contextualize the risks. Together, the reports underscore the need for monitoring and mitigation strategies during large public events that release significant particulate matter.
