Fourth of July fun comes with a word of caution for boaters and swimmers at Georgia lakes.

The U.S. Army Corps of Engineers in Mobile on Monday said the continuing drought is negatively affecting the levels at lakes it manages in Georgia, Alabama, Mississippi and Florida.

"Lakeside swimmers and boaters are encouraged to wear their personal flotation device and to take extra special precautions when lower than normal water levels occur," said E. Patrick Robbins, chief public affairs officer in the Corps' Mobile district. "The shallower water conditions could expose sandbars or stumps to those swimming or boating," he said. "Boaters should be cautious as declining levels may reduce clearance over underwater obstructions. Swimmers and boaters should always take precautions on the water even in the best conditions."

Visitors may see signs at beaches and boat ramps warning them of low water conditions. Park rangers will monitor swim areas for emerging hazards and floating debris.