The problem in the Netherlands was also due to frozen switches. They had gas heating, but this broke down. Spokesperson for pro-rail said they could have reliable electric heating switches for 45 million Euros, nationwide, which seems like a no-brainer to me because 3 days of only regional trains is really bad for the image of the railways, even if it only happens once every so many years.
Climate change means more extreme weather, so, you know, it's an adaptation measure.
I still remember the last time snow caused these issues. Only three or four years ago. Then it wasn't due to the quantity, but it being the wrong kind of snow. Too fine, would wear the wheels down too quickly. Better not to run any trains! Saves money.