A storm surge of 2 feet (0.61 meter) to 4 feet (1.22 meters) of water is expected to inundate much of the city while up 8 feet could cover other areas.Storm surge is an abnormal rise of water above the normal tide, generated by a storm.HOUSTON (AP) -- The mayor of the popular Texas Gulf Coast city of Galveston says the city is expected to be inundated with water from Hurricane Harvey.Mayor James Yarbrough said during a news conference Friday that Hurricane Harvey is expected to flood downtown streets.In a statement here today, he said four schools, Sekolah Menengah St Paul; Sekolah Kebangsaan (SK) Lago; SK Suasa and Sekolah Agama Negeri Limbawang; and 12 main routes to the villages were also flooded.
The mudflow deposit covers the broad floor of the Nagase valley.
Extremely destructive along the axis of the flows, at the margins lahars can passively enter houses through openings without destroying the building.
After emplacement of a mudflow, dewatering can cause the deposit to harden almost like concrete.
He says utility lines and other infrastructure have been upgraded since 2008 to withstand a Category 5 hurricane.
Harvey is forecast to become a Category 3 by the time it makes landfall.