What's "normal" climate?
Objectively, it's whatever it is. Things vary over time. Over short periods (days, weeks, a few years) it's weather. Over longer periods (decades, centuries) it's climate. For
official purposes, it's usually the average of some convenient, recent 30-year or so period (1970-2000 is common, with some shifting to 1980-2010) over which fairly complete records are available.
Subjectively, it's what has prevailed during the time the human species developed and lived under what it calls "civilization" - mostly since the development of agriculture, probably around 4K years ago. There's been variation during that time, too, but the range has been quite narrow, especially on the warm end, until now. What we've evolved as adaptation to climate variations during the last 4K or so years is oriented more toward mitigating cold than hot, so this is a new and disruptive (probably dangerous, as it gets worse) situation. And at this point nothing we do is likely to change matters in the short term (100 years or so).
Railroads made much of the 19th-early 20th century industrial revolution possible, as well as requiring it's products for construction and operation. Railroads are also a very efficient way of moving large loads around, with relatively small energy (hence fossil CO2 emission, using conventional fuels) expenditure. So they're both a stimulator and mitigation of the human contribution (which is largely but not entirely related to fossil fuel use) to accelerated warming. Yes, you can have it both ways. On balance, since I like trains, I see railroads as providing a net benefit.