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Firefighters are severely impacted by climate events, yet they are an underexamined population with regard to climate change research. This systematic review aims to synthesize the existing literature on the psychological effects of wildfire events on firefighters and to discuss some of the major gaps in disaster research relating to first responders and their mental health. A thorough search of the existing literature through June 2023 on the topic of wildfires and first responder psychological health was conducted through the databases PubMed, PsychINFO, and Embase. This search yielded 13 final studies which met the exclusion and inclusion criteria for this review. The final studies consisted of populations that responded to wildfire events from four different countries (two from Israel, one from Canada, two from Greece, and eight from Australia). The data gathered by this review suggest that firefighters may experience many environmental and occupational exposures during wildfire suppression, which are linked to an increased risk of PTSD and other psychological symptoms even months after the event. This review brings to light the need for further research of the compounded effect of the environmental and psychological exposures of first responders and the potential psychological effects of those exposures. [ABSTRACT FROM AUTHOR]