Emergency planning is a systematic and ongoing process that should evolve as lessons are learned and circumstances change. Its aim is to prevent emergencies from occurring and when they do occur, good planning should reduce, control or mitigate the effects of the emergency. One group pre-test post-test design was used in this study. A purposive sampling technique was used to select 150 Secondary school teachers. Based on the objective collected data was analyzed by using descriptive and inferential statistics like mean, median, standard deviation, paired t-test, and chi-square test. An analysis finds depict that the corresponding p<0.05, so the null hypothesis is rejected. The change in the post-test knowledge score (22.74) of teachers is significantly higher than the pre-test score (16.09). An awareness program is proved an effective method to improve the knowledge of teacher regarding disaster preparedness and mitigation. The study also had a significant association between knowledge score and gender, previous knowledge of disaster preparedness, and mitigation.