AUSTIN (KXAN) — The Lower Colorado River Authority is closing portions of Lake LBJ and Lake Marble Falls to recreational boating effective immediately.

The closures, announced Tuesday, include Lake LBJ from Lighthouse Drive to Wirtz Dam and Lake Marble Falls from the Highway 281 bridge to Starcke Dam.

The LCRA did not said the closure would remain in place until further notice. Additional rainfall in the Highland Lakes watershed could cause lake levels to rise quickly. Additional dam releases may be necessary with very little warning to move floodwaters downstream, the LCRA said.

A watercraft ban on Lady Bird Lake, Lake Austin and the Colorado River south of Longhorn Dam is set to expire at noon on Wednesday.

For more on floodgate operations visit the LCRA Flood Operations website.