The regulatory body in charge of the UK’s energy network has issued a plea to energy companies as the nation experiences a heatwave. A rare red warning for extreme heat has been activated in certain regions of England and Wales until 9 pm on Thursday. Forecasts predict temperatures climbing to 37-38°C in southern England, with a possibility of reaching 39°C.
The soaring temperatures have led to a surge in the purchase of fans and air conditioning units by individuals and businesses striving to keep cool. This increased demand for electricity has been exacerbated by tropical-like overnight temperatures, causing discomfort for many residents despite using cooling devices.
In response to the escalating situation, the National Energy System Operator (NESO) issued an Electricity Margin Notice for a specific period from 7 pm to 10 pm on Thursday, marking the first notice this summer after the last one in January 2025. Power station owners have been urged to ramp up supplies as necessary to avoid potential power shortages or outages.
NESO emphasizes that this action is standard procedure but highlights the imminent risk of UK’s power demand approaching or surpassing available supply. The challenge is accentuated by scorching temperatures in other parts of Europe affecting electricity imports to the UK and the reduced output from wind farms due to calm conditions.
The ongoing heatwave has prompted a rare red health alert, leading to school closures and transportation disruptions. Some schools in various regions, including Bristol, Hampshire, Berkshire, and others, have adjusted their schedules or shut down due to excessively hot classrooms.
According to a NESO spokesperson, tight electricity margins are anticipated for the following evening due to the extreme temperatures influencing the electricity system. The Electricity Margin Notice has been issued as a precautionary measure to request additional generation capacity from market participants. NESO assures that this notice does not signify an immediate risk to electricity supply.
Notably, NESO issued a similar alert last year in January due to plummeting temperatures, which were expected to elevate electricity consumption for indoor activities during cold weather conditions.