Wildfire, spills, earthquakes are biggest threats to Whitehorse: report

The 'hazard identification and risk analysis' looked at both the likelihood of different emergencies, and the potential consequences, ranked from 'negligible' to 'catastrophic.'

'I look at this as a net — so we threw that net wide, to see what kind of hazards that were out there'

A wildfire burning near Watson Lake, Yukon, in 2015. The biggest natural hazard for Whitehorse is a wildfire that reaches the city, according to a recent report. (Yukon Wildland Fire Management)

A report commissioned by the City of Whitehorse says wildfire poses the greatest risk of catastrophe to the city, followed by hazardous material accidents, major earthquakes, and extreme cold.

The "hazard identification and risk analysis" was prepared by Calian Emergency Management Solutions, an Ottawa-based consulting firm. The report was delivered to Whitehorse city council at Monday's meeting.

It analysed both the likelihood of different hazards — natural and human/technological — and the possible consequences in Whitehorse, ranked from "negligible" to "catastrophic."

Besides fire, earthquakes, and cold, other potential hazards include things such as major power failures, telecommunications failures, drought, blizzards, and hazardous material spills.

"Basically, it was a need for the city to identify what risks [exist]. So, I look at this as a net — so we threw that net wide, to see what kind of hazards that were out there," said Chris Green, deputy fire chief for the city.

'I don't think that's a surprise to anybody here, that [wildfire] would be the number one hazard that we're faced by,' said Chris Green, deputy fire chief for the city. (Mike Rudyk/CBC)

"Urban interface fire" — in other words, a forest fire that reaches the city — topped the list, with a score of 20 out of 25. It was deemed both "likely" (a rank below "almost certain"), and with potentially catastrophic consequences.

"I don't think that's a surprise to anybody here, that that would be the number one hazard that we're faced by," said Green.

"No matter what we do, the potential is always going to be there."

The risks associated with natural hazards were ranked based on their likelihood and their potential consequences. The highest possible score for any hazard was 25. (City of Whitehorse)

Prioritizing emergency planning

HAZMAT incidents — for example, highway accidents that result in spills of hazardous materials — received the next highest score of 16 out of 25. 

Major earthquakes and extreme cold followed, each with a score of 15. A major earthquake was deemed "possible" (instead of likely), but with potentially catastrophic consequences, while extreme cold was considered "almost certain," but with a potential for only moderate consequences. 

Green says the study will help the city prioritize its emergency planning. 

"No emergency is the same. So, no matter how many motor vehicle collisions you go to, no matter how many house fires you go to, no matter how many urban interface fires you go to — there's never two the same," he said.

Debris was sent tumbling down Whitehorse's clay cliffs when the city was shaken by two large earthquakes in May 2017. (Angie Dickson)

Green says the city is updating its online communications plan, so residents can know what to do in a major emergency — for example, where to find warming centres in a cold-weather emergency, or what evacuation route to use out of the city. 

A power outage in January left thousands of residents in darkness on a day when temperatures plunged to –35 C.  Some were without power for up to nine hours.

"The key thing that we want to do this year is test our evacuation procedures ... see what kind of hiccups we're gonna have, and fix them. So when the real thing happens, we already have a system in place that's going to work," he said. 

"By the end of 2019 our emergency master plan will be where it needs to be," he said. 

With files from Nancy Thomson and Sandi Coleman


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