The railways in this country, AND in Northern Europe, have been affected by this record breaking period of extreme heat which is not generally allowed for in the usual calculations of laying the tracks. Trains in the UK AND in Europe have been running at reduced speeds and frequency as a safety measure so as to not put their passengers at risk from buckled track. The overhead wires have also been affected, particularly at Kings Cross where a cable short circuited and caused a track side fire.
Its utter, sheer incompetence. There are lost of places in the world with less moderate climates than ours, and cope well.
Like the NHS, this ex civil service institution cannot be fixed, and is gobbling money for no gain. Our money.
AS for 'modern' air travel verses "Victorian" transport, well over 100 flights have been canceled in and out of Heathrow due to the heat here in the UK and elsewhere in Europe. So extreme heat affects everything no matter what "age" the method of transport is from!
Were any of the major roads closed due to it? Nope. A bit of weather, of any kind, and the Victorian shit falls apart.
The planes were cancelled due to storms, not heat. But are working today. Unlike the 3 month repairs when a storm gets near a railway.
As I stated, our railways are built for our traditional climate, not extreme heat and it would cost four times - billions- as much to make them able to cope with the record temperatures seen. But, at least they still ran in part, unlike dozens of flights due to a air traffic control centre failure, storms, all brought about by the heat. So hi tech became low tech and unlike the "Victorian" technology, with trains still running in the main, but more slowly and of lesser desity, but aircraft not taking off or landing. Indeed in the USA temperatures in Arizona went to 49 degrees C, and flights were cancelled due to heat - so we are not alone. As for working today, well no, the media is still reporting cancellations and general disruption.
As for the roads, yes, they were very hot and not pleasant to travel on, but they, dating from Roman times, were still operating. But I wonder how many "modern" vehicles broke down due to the extreme heat?!
In all, no matter what mankind does, we will always be at the mercy of our weather extremes, but unless you want to pay a lot more in taxes, they will not be made weatherproof in the near future, but no doubt with climate change, that still people deny is happening, it will have to happen