Rumbling Clouds

These big clouds are constantly rumbling but so far no thunderclap or rain.
One section passed over and after some time broke into a huge clap of thunder. They are crossing front to back of my flat so I have been going backwards and forwards to watch it’s progress. It’s still hot at 33c and humid and I’m dripping. Fan on again.
I haven’t been out as I thought it would pour down.
I was very sorry to hear about the rail accident in Scotland. I have been watching the news. I hope no one is badly affected.