Despite the scorching temperatures, some of the storms that swept across the capital last night contained large hail stones.
Robbie Collin posted a picture on Twitter of his living room window, which had been smashed during a thunder storm.
He wrote: "Err, wow. A sudden hail shower in SW London has just SMASHED MY LIVING ROOM WINDOW."
More top news
The 47-year-old man died shortly after 3pm on Tuesday.
Specialist explosive detection dogs searched through the town examining letter boxes and phone booths for signs of potential devices.
Temperatures reached 29.1C in St James's Park, central London.