THUNDERSTORMS are expected to bring an abrupt end to the sunshine later this week. 

The Met Office has issued a yellow weather warning for thunderstorms on Thursday, August 1 at 12am until midnight the same day. 

Heavy showers are forecast to fall on Bournemouth, Christchurch, Poole and the rest of Dorset for the day. 

The heaviest showers could result in 20-30 mm within an hour, with 24 hour accumulations possibly reaching as much as 70-90 mm where multiple showers affect the same location, the Met Office said. 

A spokesman said: “Consider if your location is at risk of flash flooding. If so, consider preparing a flood plan and an emergency flood kit.  

“Prepare to protect your property and people from injury. Before gusty winds arrive, check to ensure moveable objects or temporary structures are well secured.  

The Mett Office added to expect: “Spray and sudden flooding could lead to difficult driving conditions and some road closures 

“Where flooding or lightning strikes occur, there is a chance of delays and some cancellations to train and bus services 

“There is a slight chance that power cuts could occur and other services to some homes and businesses could be lost 

“There is a small chance that homes and businesses could be flooded quickly, with damage to some buildings from floodwater, lightning strikes, hail or strong winds 

“There is a small chance of fast flowing or deep floodwater causing danger to life.” 

Meanwhile, the UK Health Security Agency has warned residents across the county and south west of rising temperatures. 

The government organisation has issued a heat health alert for Monday to Wednesday, predicting temperatures to rise to a summery 28C.