Hurricane Harvey was deemed a 500-year storm, which means it had a 1-in-500 probability of happening in a given year.
EMG6301 Emergency Management Unit 5 Journal Instructions Hurricane Harvey was deemed a 500-year storm, which means it had a 1-in-500 probability of happening in a given year. The Houston area has experienced three 500-year storms in three years (2015–2017). Land use has been identified as a contributing factor of the severity of the storms. […]