This is a graph showing official number of deaths in Germany for every day since 2020. The red line is for 2026 and the big spike is the recent heatwave. The three days with the most deaths since at least 2020 have all happened just two weeks ago.
Protest. Vote. Do what you can to make changes in your own life - and talk about them.
The individual doesn't make that big a difference on their own, but by getting the word out, an individual also moves the dial on what is normal and what is acceptable. Topical: there's a lot of talk about air conditioning now due to the heat waves. Among my friends I quite strenuously objected to people using aircon when, generally, we can make do with passive approaches and fans. (Most people in my country keep the windows open in a heatwave even when it's hotter outside - that's how useless we are as a country). Someone else also asked if I was thinking about getting aircon, and I said I wouldn't do it unless I had solar panels. These kinds of conversations don't convince anyone who thinks "drill baby drill" to give up flights, meat and comforts like A/C but they still matter, because a person's opinions are influenced by everything they hear.
I'm not vegetarian, but I'll talk to anyone about how I consciously eat significantly less meat than I used to for mainly environmental reasons and it's the same thing.