The London Mayor's office has issued a stark warning that middle-aged Londoners, specifically those aged 45 to 65, face the same risk of dying during a heatwave as pensioners aged 65 and older. This revelation comes as the capital braces for another spell of warm weather, with temperatures forecast to reach up to 27°C from June 13 to June 17.
Heat Risk Factors Highlighted
In written evidence to the London Assembly's Planning and Regeneration Committee, City Hall officials noted that while heat risk is strongly correlated with older age, younger adults in London have a disproportionate level of risk. The evidence stated, "Londoners aged 45-65 years have the same risk of dying during hot weather as those aged 65+ years." Additionally, there is some evidence that women may be more vulnerable than men to high temperatures, though the reasons behind these trends were not elaborated upon.
Types of Heat Risk
The officials outlined two forms of heat risk. Classic heat stroke, the most common cause of heat-related premature mortality, occurs when the body cannot regulate heat even without physical activity, primarily affecting older adults and those with pre-existing conditions. Exertional heat risk arises when physical activity overwhelms the body's cooling capacity, particularly in hot or humid conditions, and can affect even younger, healthy individuals.
Urban Heat Island Effect
London's urban heat island effect exacerbates temperatures, making the capital significantly hotter than surrounding areas. Commuters on the Tube also face soaring temperatures. Will Norman, the capital's Cycling and Walking Commissioner, highlighted that a green square with trees can be 4°C cooler than a concrete square during a heatwave.
Home Overheating Crisis
The committee emphasized that nearly 92% of existing homes could be at risk of overheating by 2050 without proper adaptation. Deputy Mayors Mete Coban and Jules Pipe described overheating as a social justice issue, disproportionately affecting vulnerable groups and low-income households. They noted that residents in high-density or high-rise flats with limited ventilation, particularly in boroughs like Islington, Hackney, and Tower Hamlets, are most at risk.
Committee Inquiry
The committee will explore how overheating affects Londoners, why some homes are more vulnerable, and whether current planning rules and building standards are adequate. They will examine passive cooling measures like shading and ventilation versus active cooling like air conditioning. The public is invited to share their experiences of the May heatwave by July 5.
