The "Nature of Things" host made the comments in a talk posted to YouTube after he joined Dr. David Schindler for "Letting in the Light," a symposium on water ecology held at the University of Alberta on Oct. 30 and 31.
An excerpt of the talk shows Suzuki outlining a frightening scenario that would result from the destruction of the nuclear plant.
"Fukushima is the most terrifying situation I can imagine," he said.
"Three out of the four plants were destroyed in the earthquake and in the tsunami. The fourth one has been so badly damaged that the fear is, if there's another earthquake of a seven or above that, that building will go and then all hell breaks loose.
"And the probability of a seven or above earthquake in the next three years is over 95 per cent."
Suzuki said that an international team of experts needs to go into the Fukushima plant and help fix the problem, but said the Japanese government has "too much pride to admit that."
"If that isn't terrifying, I don't know what is."
Suzuki's warning came as radiation from the Fukushima plant has been detected in northern Alaska and along the west coast, CBC News reported.
Radiation in Alaskan waters could reach Cold War levels, said Douglas Dasher, a researcher at the University of Alaska Fairbanks, although John Kelley, a professor emeritus at the same university, doesn't seem as certain that it will reach dangerous levels for humans.
"The data they will need is not only past data but current data, and if no one is sampling anything then we won't really know it, will we," he told the network.