A combination of Saharan dust and pollution drifting in from continental Europe towards London is the cause of the high air pollution

The Mayor of London, Sadiq Khan, has triggered a “very high” air pollution alert for London today (6th March).

Forecasters at Imperial College London advised the Mayor to issue the alert due to a likelihood of high levels of particulate matter, caused by a combination of Saharan dust and pollution drifting in from continental Europe towards London.   

Pollution levels are expected to be highest early on Friday after which stronger winds will help disperse the accumulated pollution. 

This is the first high air pollution alert this year. 

Adults and children with lung or heart conditions are advised to adapt physically demanding activities outdoors, especially if symptoms get worse. They are also asked to consider taking routes where there is less traffic.

Short term exposure (over hours or days) can cause a range of health impacts, including coughing, eye, nose and throat irritation, chest tightness and pain, difficulty breathing, and worsening of any existing lung or heart conditions.

The Deputy Mayor for environment and energy, Mete Coban said: “Toxic air is responsible for around 4,000 premature deaths in London each year, which is why the Mayor has done everything in his power to tackle it, which includes launching the world’s largest clean air zone. 

“We are urging Londoners to look after themselves in this high pollution period, stop their engines idling, and refrain from burning wood or garden waste – all of which contribute to high levels of pollution. This is particularly important in order to protect the most vulnerable as we continue building a safer and greener London for everyone.” 

City Hall issues alerts to Londoners, schools, and London boroughs when moderate, high or very high air pollution is forecast. High air pollution alerts are also displayed at public locations across London, including all bus stop countdown signs, as well as on the Underground. 

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