A bright blue light lit up the sky as Storm Isha caused chaos overnight. Residents across Gravesend and Meopham were shocked to see the bright flash as it was suspected a power line had gone down just before 9.30pm. Charley May, who filmed the spectacle above her house in Dobson Road, said: “The whole sky in Gravesend turned a bright blue colour. “It was scary. At first I thought it was a gas explosion in the distance and then when I didn’t hear any noise I realised it was probably a power line. “I’ve never seen anything like it. I thought it was lightning, but the whole sky was a greeny blue …