What can be done to prevent more dangerous heatwaves in Europe?

Does Europe need to plant more trees in it’s cities?

It appears that Europe does many things right for sustainability and climate change - public transit over cars, recycling, reducing carbon footprint better compared to other parts of the world. Of course all communities can do better at reducing their carbon footprint - Is this America’s fault with their carbon footprint that Europe is suffering? America has their cars, and simply cranks up their Air conditioners when it’s hot.

What else is there to do? I thought China had success improving their renewable energy output, even though they are still polluters, is it the actions of China and the USA causing misery in Europe? How do we help Europeans suffering and prevent this from happening again?