High temperatures can cause the brain to divert resources to other parts of the body to cool down,. This makes it harder for a person to process information and control emotions, as areas of the brain are not running at full capacity. This would be a direct impact of hotter temperatures on thoughts and behaviors.
The disruption caused by climate change also acts as what the U.S. military has described as a “threat multiplier” that may lead to greater instability in some affected regions. According to Anderson and Though he wrote several pieces that explicitly talked about the multiple ways that rapid climate change played a role in the likelihood of violent behavior, there was a lot of resistance in the psychology community.
"One that would have some impact, and in a sense, alert the climate science community, to think about the long term impact on humans and the multiple tools that can be used to mitigate some of the problems of climate change. Convince populations to elect politicians who will take positive action towards reducing the amount of temperature increase that we're going to see. So, you know, we have multiple goals here," he explains.
That's very true.