To be honest, it's not unusual for that part of the Europe to be pretty yellow in August. I was taking train rides to Budapest regularly between 2010-2020. But it's getting worse for sure.
I agree with that, but was specifically referring to the description of everything being very dry in that area. I noticed this already 15 years ago, the area around Budapest was much more yellow and dry compared to countries up north.
But yes, the intensity and especially the duration of the heat has intensified. I stopped visiting my family in the south of Europe around five years ago, and visit in either fall or spring. Can't really take the heat, it's not worth it.