Firefighters perform all kinds of rescues. Their job places them in potentially traumatic situations which may cause work-related mental disorders. This study aimed to investigate the working conditions and mental health of firefighters in Southern Brazil. The research subjects included 25 men and 2 women. The authors analyzed the anxiety, depression, alcohol use, post-traumatic stress disorder, and work environment of the firefighters, by means of scales, a questionnaire and an interview. Descriptive analysis and correlation measures were used, based on the variables of interest and content analysis. The results indicated that these professionals need higher salaries, better equipment and more training. Personal valorization and conversations with superiors were cited as positive aspects. Regarding the main aim of the study, the authors found correlations between alcohol abuse and length of service, alcohol abuse and age, and depression and age. These data suggested that there is emotional wear related to the profession, and the need of psychological support.