A blue-green algae bloom detected at Lower Thetis Lake’s main beach prompted a Capital Regional District health advisory on July 20, 2025, warning humans and pets to avoid the water.

Blue-green algae blooms, exacerbated by climate change and nutrient runoff, are increasingly appearing in the Great Lakes, posing risks to human and environmental health.

Necropsy results show blue-green algae caused the deaths of three dogs playing near the St. John River more than a week ago.

A persistent heatwave in Finland is fueling dense blue-green algae blooms in the Baltic Sea’s Gulf of Finland and Archipelago Sea, with freshwater sightings remaining stable.

Meech Lake beach is closed due to a potentially harmful blue-green algae bloom, alongside a fire ban affecting Gatineau Park areas.