 The most active month is September, with 21 total storms, while no recorded storms have affected Texas during the months of December through May.While the most intense storm in terms of barometric pressure is Hurricane Allen in 1980, Hurricane Harvey in 2017 caused the most fatalities and damages, with $125 billion in Texas.The first storm to impact the state during the period is also Hurricane Allen in August 1980, with the most recent being Hurricane Harvey on August 25, 2017.