Record-Breaking Heat Expected This Week
The Met Office has issued rare red weather warnings for extreme heat across parts of England and Wales, with temperatures forecast to reach 38-40C, potentially breaking the June record set in 1976 by several degrees. The hot conditions, driven by a heat dome over western Europe and intensified by human-driven climate change, will be accompanied by high humidity and very warm nights, making recovery difficult overnight.
Red and Amber Warnings in Place
The red warning covers an area from London to Swansea and Somerset to Birmingham, effective from 9am on Wednesday to 9pm on Thursday. This alert is reserved for the most severe events and indicates widespread health risks, including danger to life even for those not normally vulnerable. Substantial changes in working practices and daily routines are required, and there is a high risk of failure of heat-sensitive systems and equipment, potentially leading to loss of power, water, electricity, gas, or mobile phone services.
An amber weather warning is also in place for a larger area of England and Wales from Monday to Thursday, and a yellow thunderstorm warning is in effect until 9pm on Monday for areas between Bristol and Aylesbury, Buckinghamshire.
Health and Safety Impact
Dr Will Lang, chief meteorologist at the Met Office, said: “We are forecasting extreme temperatures in the next few days, particularly on Wednesday and Thursday, when it looks like we’ll be seeing maximum temperatures into the high 30s. But also we are stressing very high overnight temperatures which will be very uncomfortable for vulnerable groups, and very humid conditions as well.” He noted that the conditions far exceed past June heat and are on a much larger scale than the heatwave in late May.
The UK Health Security Agency (UKHSA) issued a red health warning for six regions of England – West Midlands, East Midlands, South East, South West, London, and east of England – from 1am on Wednesday until 11pm on Thursday. This indicates a risk to life for even the healthy population and potential effects on transport, food, water, energy supplies, and businesses. A separate amber health alert covers the North West, North East, and Yorkshire and the Humber.
Dr Agostinho Sousa, head of extreme events and health protection at the UKHSA, said: “It is vitally important that people understand the risk posed by high temperatures like these, and take steps to keep themselves and their friends, families and neighbours safe.”
Fire and Water Safety Warnings
Fire chiefs urged the public to take extra care in outdoor spaces due to increased risks of wildfires and water-related deaths. Phil Garrigan, National Fire Chiefs Council (NFCC) chairman, said: “We have already seen the consequences that periods of extreme heat can have, with a number of lives tragically lost in water-related incidents during recent hot weather.”
Transport Disruptions Expected
The Met Office warned of travel disruptions, including delays on roads and road closures, as well as delays and cancellations to rail and air travel. Rod Dennis, road safety spokesperson at the RAC, warned of a potential record number of breakdowns and urged drivers without effective air conditioning to avoid non-essential journeys. The AA noted that gritters might be deployed on some roads due to potential surface softening or rutting under heat.
Transport for London (TfL) warned of possible disruption to rail and Tube services, with rail temperatures leading to temporary speed restrictions. Claire Mann, TfL’s chief operating officer, said: “Customers should be aware that, given the very high temperatures that are forecast, we are likely to see some disruption to rail and Tube services – with rail temperatures likely to lead to temporary speed restrictions and therefore reduced services in some cases.”
Schools and Workplaces Affected
The National Association of Head Teachers (NAHT) has provided guidance to members on dealing with the heat, including considering closure. Paul Whiteman, NAHT general secretary, said: “While there is no legal ‘upper limit’ for temperature in schools, (school leaders) will certainly be doing all they can to mitigate the effects of such high temperatures.”
Employers are urged to assess risks, with Acas recommending fans, portable air-cooling units, more frequent breaks, and relaxed dress codes. Ruth Wilkinson of the Institution of Occupational Safety and Health warned that outdoor workers face the most immediate risks, while indoor workers may also suffer from poor ventilation.
Climate Change and Future Risks
Scientists attribute the heatwave to a heat dome – a high-pressure system trapping heat over the region. Akshay Deoras of the University of Reading said: “This is not just a heatwave, it is a heat-dome driven furnace that will grip most of southern UK and push temperatures into truly exceptional territory.” He added that human-driven climate change has provided the springboard for this event.
Bill McGuire, professor emeritus at University College London, warned that temperatures above 43C are now possible in the UK, but health services, energy infrastructure, and transport are not built for such conditions. Gareth Redmond-King of the Energy and Climate Intelligence Unit noted that the heatwave coincides with parliamentary debates on net-zero plans, emphasizing that temperatures will continue to rise until emissions reach net zero.
Drought and Agricultural Concerns
Last week, the national drought group reported increased drought risk, with East Anglia returning to “prolonged dry weather” status and Devon and Cornwall on a watchlist. Farmers are facing growing pressure, with many starting to take water from rivers and lakes earlier than usual to sustain crops. The Environment Agency is working with water companies on drought plans and monitoring water levels.
