Spectacular thunder and lightning shows were witnessed across the UK - by some estimates there were as many as 30,000 lightning strikes.
The image above from LightningMaps.org shows just some of them from midnight on Friday.
Worst #thunderstorms I've ever seen across #Dorset tonight, lots of flooding so be careful out there people. pic.twitter.com/ROEmPKQMzL
— Dorset Van Driver (@viewfromthevan) July 3, 2015
I am sooo terrified of thunder so last night in London was absolute hell, I was in tears in bed!! #thunderstorms #London
— Aisling Sheehan (@Aisling_S101) July 4, 2015
Awesome #lightning over Blackpool Tower #storm #thunderstorms Can't believe I got this shot! pic.twitter.com/88yBwViZoi
— Stephen Cheatley BFC (@Stephencheatley) July 4, 2015
Alongside the lightning, heavy rain led to high rainfall totals over the last 12 hours.
Swanage saw 27mm of rain in one hour between 10pm and 11pm, according to the Met Office - just over half a month's rain in one hour.
Watching an amazing Thunder and Lightening display from my balcony! Just took this shot! #London #thunderstorms pic.twitter.com/SknfYYKjk5
— THE DFG (@thedfg9) July 3, 2015
Spectacular photo over Rossall School from the recent thunderstorms! @rossallpoint @lancashirelife #thunderstorms pic.twitter.com/PkkguEpKGM
— Rossall Head (@RossallHead) July 4, 2015
Storms earlier in the week saw golf-ball-sized hailstones cause damage to cars and greenhouses, all amid the hottest July temperatures on record.
Temperatures on Wednesday reached nearly 37C.
High temperatures looked set to continue on Saturday, with the Met Office predicting "very warm" conditions in the south and east and possibly more thundery weather again tonight.
Comment: The storms have claimed three lives after two hill walkers were struck by separate lightning bolts and a boy died after getting into trouble in a river.