Last year, researchers found the largest growth in blue-green algae in recent history. They say the smoke from the Caldor Fire is to blame. "Based on what we saw last year, we are expecting this ...

Blue-green algae, also known as harmful algal blooms, can look like foam, paint, or scum on the water and appear in shades of blue, green, brown or red.The toxins they produce can be dangerous if ...

During a bloom, the water becomes less clear and may look green, blue-green or greenish-brown. Scums can form during calm weather when several bloom forming species rise to the surface.

The blue-green algae watch at Pony Creek Lake in Brown County has been lifted. Advisories are lifted when cell densities and toxin concentrations dissipate to levels below the Watch thresholds.

But, should average summer air temperatures rise by a few degrees, some of those crystal waters could turn a murky green or brown, the team reports in the Sept. 28 Geophysical Research Letters.

The Kansas Department of Health and Environment (KDHE) and the Kansas Department of Wildlife and Parks (KDWP) have issued a warning advisory due to blue-green algae for a few Northeast Kansas lakes.