Cities around Canada are urging swimmers to take caution as toxic blue-green algae warnings are in effect throughout the nation. This algae, if in contact with humans and pets, can be extremely harmful.

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

Alberta Health Services has issued a health advisory for Heritage Lake, near Morinville, until further notice. Blue-green algae blooms have been Alberta Health Services has issued a health advisory for Heritage Lake, near Morinville, until further notice.

There is unusual abundances of blue-green algae on West end of Fraser Lake.