British police forces have introduced new operational protocols for extreme heat events, following the collapse of a series of European initiatives that relied on chalk markings on windows to monitor vulnerable residents. The move reflects a growing recognition that ad hoc community-led measures are insufficient in the face of climate-driven temperature extremes.
The chalk-on-windows scheme, piloted in several European cities including Paris, Madrid, and Rome, asked volunteers to mark the windows of elderly or isolated individuals with a coloured cross each morning. A missing mark would trigger a welfare check. The initiative was lauded for its simplicity and low cost, but has been abandoned in many areas after reports of vandalism, confusion over colour codes, and a lack of sustained volunteer engagement.
In contrast, the UK's new protocols, announced by the National Police Chiefs' Council, are designed to be more robust and centralised. Officers will now be required to check on at-risk individuals during heatwave warnings, with specific guidance on hydration, cooling centres, and transport of vulnerable people to shaded areas. The protocols also mandate that police coordinate with local authorities and health services to pre-identify those most at risk.
“We cannot rely on chalk marks or goodwill alone,” said Chief Constable Mark Hobson of Thames Valley Police, who led the working group that drafted the protocols. “Heatwaves are becoming more frequent and more severe. The police have a duty to protect the public, and that means having a structured response in place.”
Critics argue that the chalk schemes were never intended as a substitute for professional services. “They were a community tool, not a government policy,” said Dr. Elena Rossi, a sociologist at the University of Bologna who studied the initiatives. “The failure of a volunteer project should not be used to justify greater state intervention. The real lesson is that communities need support, not replacement.”
However, UK officials maintain that the new protocols are a necessary evolution. The Met Office has issued its first red extreme heat warning for parts of England this July, with temperatures expected to exceed 40°C. Previous heatwaves in 2022 led to an estimated 3,000 excess deaths across the country, many among the elderly living alone.
The adoption of formal police protocols places the UK ahead of many European peers, but also raises questions about resource allocation. “Police forces are already stretched thin,” noted Simon Greaves, a criminologist at the University of Cambridge. “Adding heatwave duties without additional funding could lead to trade-offs elsewhere.”
The National Police Chiefs' Council has acknowledged this concern, stating that the protocols are designed to be integrated into existing patrols and do not require dedicated personnel. “This is about mainstreaming heatwave awareness into everyday policing,” said Chief Constable Hobson.
As global temperatures continue to rise, the intersection of public health and law enforcement is likely to become more prominent. The UK's move signals a shift towards institutionalised response, moving away from the experimental and often fragile community-led models seen in Europe. Whether this approach proves more effective remains to be seen, but for now, British police are preparing for a hot summer with chalk no longer on the menu.
