Houston ? Humberto strengthened into a hurricane early today as it edged toward the Texas coast, packing 80 mph winds and promising more rain and possible flooding to a state coming off one of the wettest summers in more than 50 years.

At 12:15 a.m. CDT, the center of the hurricane was about 20 miles east of Galveston and about 15 miles south of High Island. It was moving toward the north-northeast near 8 mph.

Forecasters warned residents along a 220-mile stretch of coastline extending into southwestern Louisiana to brace for the storm, which was expected to slosh ashore south of Houston overnight.

Texas has had one of the wettest summers on record, with Houston soaked under the most rain it’s had in a summer since 1942. With the ground already saturated, flooding was likely.

In Austin, Gov. Rick Perry activated 50 military vehicles with 200 soldiers, plus a half-dozen helicopters and two swift-water rescue teams. Other crews from the U.S. Coast Guard were on standby.