Thousands of lightning strikes light up sky across southern England

Image source, Wapping Weather / Weather Watchers Image caption, Ligntning flashes over Wapping in London in the early hours of Tuesday morning. By Simon King , Lead Weather Presenter  and  Henry Moore Published 23 June 2026, 09:28 BST Updated 16 minutes ago Thousands of lightning strikes lit up the sky overnight, as thunderstorms caused flash flooding and travel disruption across parts of England. The storms rolled into the south west on Monday evening and moved towards the south east during the night, with people reporting being woken up in the early hours by loud crashes of thunder and flashes of lightning. London Fire Brigade said it responded to 400 calls overnight, including two house fires believed to be caused by lightning strikes, while a house in Bristol was set ablaze during a storm earlier in the evening. It comes as England braces for temperatures of up to 40C, with the Met Office issuing a rare red alert set to come into force on Wednesday. Floods, fires and travel disruption after overnight storms, as UK set for record June heat Met Office data suggests there were 29,000 lightning strikes in a 24-hour period, with some very heavy rain in some areas leading to flash flooding. The intense thunderstorms developed due to a couple of factors. The first is that it was very warm if not hot across southern England on Monday afternoon and temperatures soared into the high 20s and low 30s. This heat transfers into the atmosphere, giving it a lot of energy. That energy is then primed for a trigger to covert it into big cumulonimbus - thunder - clouds. The trigger was an atmospheric disturbance higher in the atmosphere - which essentially allowed all that stored energy to be released, resulting in the intense thunderstorms. Image source, Gardener Patrick / Weather Watchers Image caption, The storms travelled across the south of England from Monday evening into the early hours of Tuesday Image source, Marzy / Weather Watchers Image caption, The overnight storm caused flash-flooding, such as here in Hammersmith, London How to keep your home cool in hot weather Published 22 hours ago What are the heat exhaustion and heatstroke symptoms? Published 22 hours ago How to sleep in the heat Published 22 hours ago Can you keep your kids off school or refuse to work during a heatwave? Published 4 minutes ago Image source, Leigh / Weather Watchers Image caption, The London skyline was dominated by flashes of lightning in the early hours of Tuesday morning Image source, Peter Barrett / Weather Watchers Image caption, Lightning bolts lit up the night sky in Hornchurch, Greater London Image source, Roger / Weather Watchers Image caption, In Bristol, one home was set on fire during the storm Image source, PJE / Weather Watchers Image caption, Lightning strikes near a row of houses in Bath, Somerset Image source, Josie / Weather Watchers Image caption, Forks of lightning could be seen above Bath on Monday evening Image source, MagTel / Weather Watchers Image