Unfortunately, this seems to be the new norm. Even in Canada, we are breaking records for heat. Temperatures have reached 49 C / 120 F Despite that, I believe Canada will be a major recipient of these climate refugees when places just get too hot to live in. That'll also be an option reserved for the privileged.
To change the slope, exactly two things work: reducing our consumption and reducing our birth rate. Mechai Viravaidya in Thailand showed how to reduce birth rate in the opposite of China's One Child policy or eugenics -- that is, voluntary, noncoercive, even fun -- as did Costa Rica, Iran, and several other countries. Most Americans can improve their quality of life by lowering consumption. I reduced mine over 90% with just life improvements. I estimate most Americans can reduce theirs 80% or more without sacrifice, just improvements. The most polluting can probably reduce theirs 99%.
Systemic change begins with personal transformation. Government and corporations will follow individual action, as they historically have. Personal transformation enables us to lead others. Leading others has the biggest effect because it multiplies.