The United Kingdom is likely to experience a wetter and stormier meteorological autumn, with forecasters warning of an increased risk of flooding. These conditions are being linked to a near-record strength El Niño developing in the Pacific Ocean, which influences global weather patterns.
The Met Office has indicated that the chances of a warm and wet autumn for the UK are between 1.5 to 2 times higher than average. Additionally, the season may bring more frequent windy conditions later on. Historically, strong El Niño events have correlated with warmer, wetter, and stormier weather in the UK and northern Europe during late autumn and early winter.
Met Office chief meteorologist Ian Lisk stated that while El Niño is a significant factor, it is not the sole determinant of UK weather. "El Niño is only one of several factors affecting the UK's weather and it does not determine exactly what conditions we will experience," he said. He also noted that the strength of the El Niño event does not automatically guarantee more severe impacts for the UK, and the Met Office will continue to monitor developments.
Despite the forecast for increased rainfall, several water companies have indicated that hosepipe bans are likely to remain in place for months. Anglian Water, which supplies seven million customers in eastern England, expects restrictions to continue until winter, citing the need for significant rainfall to replenish reservoir levels. Similarly, Thames Water has stated its ban in London and surrounding areas is expected to last until near the end of the year, due to high demand on supplies.
The Environment Agency reported that nearly three-quarters of England remains in drought, despite recent rain. Officials emphasized that while the landscape may appear greener, reservoir levels are a concern, and a substantial amount of rainfall is still needed to recover from the ongoing dry conditions. This is the third drought event in five years for the country.
Summer heatwaves exacerbated the water stress, leading to increased demand from the public, agriculture, and industry, with water usage rising by up to 30% on the hottest days. The south and east of England have received only about half of their expected rainfall over the past six months. While a wet week in late August and early September improved river flows and soil moisture, long-term recovery of groundwater reserves will take time.
The prolonged dry weather has also impacted farmers, affecting crop yields and increasing the prevalence of bluetongue disease, spread by midges, which is placing pressure on livestock. Some farmers have had to dip into winter feed stocks due to the dry conditions affecting grazing pastures.