Much of the damage was done well away from the landfall site, as Carla caused one of the largest hurricane-related tornado outbreaks on record at the time, when 26 tornadoes touched down within its circulation. One F4 tornado ripped through downtown Galveston, killing several (sources differ on the exact number, varying from 6 to 12). Outside the protection of the Galveston Seawall, structures on the island were severely damaged by storm surge. Damage was reported as far east as the Mississippi River delta.