There is increasing evidence that climate change and the threat it poses may increase authoritariantendencies within populations, contributing to increasing polarization and blocked climate change action.However, the mechanisms for these effects are still underexplored. In this study, we conduct a surveyexperiment (N=570) to better understand the connections between authoritarian predispositions,authoritarian attitudes, climate change threat, anger about climate change, and climate change responsebehaviour. We find that: 1. individuals with authoritarian predispositions who are exposed to climate changethreat become more authoritarian, while those with libertarian predispositions become less authoritarian; 2.exposure to climate change threat makes people angrier, which motivates action to mitigate climate change;and 3. authoritarian attitudes are negatively related to anger and climate change action. This indicates thatclimate change threat can motivate positive action to mitigate climate change but at the expense of makingauthoritarians more intolerant and punitive.