During the summer if 1976 there were twenty thousand excess deaths. So, yes, it is expected that the current heatwave will cause a raise in these this year.
Back in 1976 those of us on here were young (many even children), and such things as those figures really do not really penetrate that age group then or now.
It is we age we get more aware of our own mortality. No point in getting scared!!! We all have to die sometime. We can, however, help ourselves in the current situation - lots of non-alcoholic fluid to be consumed, stay indoors as much as possible. no great excess exercise, drink more fluids (know I have repeated this, but it is probably THE most important thing. If you do go out, wear a hat, sunglasses, and use an umbrella to keep of sun.