planet, turbo charging the storm, bringing the wind and fueling this moisture. >> matt, thank you. they believe the eye of the storm could pass over port lavaca, texas. there are mandatory evacuations there tonight. home to nearly half of the u.s.' oil refineries. rob marciano is there. you're seeing the storm surge already? >> reporter: the wind is picking up, and the water is piling up. this is a bay, but it's rolling in here like the ocean. this entire area of texas, very vulnerable to storm surge. tonight, areas south of houston, scrambling to prep for the northern, more ferocious half of hurricane harvey. >> we've got the generator on the back porch, we've got the house all boarded up, we're riding it out. >> reporter: you're ready? >> you betcha. >> reporter: farther west, closer to the expected landfall, a surge of waves and water churning up matagorda bay,