NEW ORLEANS (AP) — The Lake Pontchartrain Basin Foundation says the hot, calm weather has brought algae blooms on parts of Lake Pontchartrain — mostly on the south shore, but a few on the north shore.

Executive Director John Lopez says they’re patchy, with each covering probably less than one-tenth of a square mile — about 64 acres or less.

He says wind appears to be pushing algae along the south shore.

Lopez says the algae don’t appear to be toxic, but swimmers should avoid the blooms anyway because they’re difficult and unpleasant to swim in.

He says water that looks green or contains floating green mats is likely to be an algae bloom.