Record Heat Linked to Fish Kill in Potomac River

The Maryland Department of the Environment has reported a notable fish kill affecting nearly 14 miles of the Potomac River in Montgomery County. This incident is believed to be linked to extreme heat conditions that prevailed over the Fourth of July weekend.

During this period, temperatures in parts of Maryland soared above 100 degrees, setting new records across the state. The water temperature in the Potomac River reached an alarming 94 degrees upstream of Little Falls, the department noted.

The investigation into the fish kill began on Saturday, with officials attributing the deaths to a combination of heat stress, drought, and potential bacterial infections. The affected area extends from White's Ferry to Violette's Lock, where the majority of the deceased fish were identified as golden redhorse suckers, a species native to freshwater environments in the eastern United States.

While the Maryland Department of the Environment continues to collect water quality data, preliminary findings indicate no signs of a chemical spill or pollution incident contributing to the fish mortality. Fish kills are typically more prevalent in summer months when water temperatures rise and oxygen levels decrease. Factors such as rapid temperature fluctuations and runoff pollution can exacerbate these events.

Reported by HarborBeat based on The Baltimore Banner (source).