Some alarming news about the Great Lakes from the US Army Corps of Engineers.

It says two of the Great Lakes have hit their lowest water levels ever recorded.

Tests taken last month show Lake Huron and Lake Michigan were 68 centimetres below their long-term average, and had dropped 43 centimetres since January of last year.

The other Great Lakes - Superior, Erie and Ontario - were also well below average.

Scientists say drought and other natural forces, along with dredging of rivers that drain from the lakes, have contributed to the level drops.