Passengers from a commuter train in Toronto had to be rescued as an abnormal amount of rain fell suddenly on Canada's biggest city. City cewers were unable to cope with the amount resulting in major flooding of streets, highways and the dity subway system.

July 2013: Passengers from a commuter train in Toronto had to be rescued as an abnormal amount of rain fell suddenly on Canada's biggest city. City cewers were unable to cope with the amount resulting in major flooding of streets, highways and the dity subway system.
Photo Credit: CBC

Wild weather: cities not planning for the “new normal”

David Phillips is a senior climatologist at Environment Canada.

He says municipalities are still stuck in old planning ideas when the both the changing climate and changing urban centres require new concepts to cope with the new normal of wilder weather.

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Dave Phillips, a senior meteorologist at Environment Canada
Dave Phillips, a senior meteorologist at Environment Canada © CBC

 Listening to world news one hears of more and more natural disasters, more drought, extreme droughts, extreme floods, massive snowfalls, hugely destructive ice storms, hurricanes, and so on.

“There is no “normal” weather anymore” D Phillips

Phillips says the “normal”, ie general stable expectations of climate and weather are things of the past. He says the unexpected is the new normal.

The new normal also means that the extreme conditions of “100 year events” or 50 or 30 year weather events- snow or ice storms, droughts or floods- have now become five or 10 year events.

Ice storm damage in Toronto, December 2013. Abnormal weather conditions like and increase in ice storms wreak havoc on city infrastruction such as power lines, and increase clean-up costs dramatically
Ice storm damage in Toronto, December 2013. Abnormal weather conditions like and increase in ice storms wreak havoc on city infrastruction such as power lines, and increase clean-up costs dramatically © CBC

 These also mean that there are huge costs involved. When older storm systems can’t handle sudden massive rains, the flooding causes great disruption and results in vast and costly damage.

Structures built to withstand the occasional storm of the past, are unable to withstand the more violent storms that are happening.

In millions of dollars: The top ten most expensive natural disasters in Canadian history (not adjusted for inflation.) The most expensive flood in Canadian history occurred in April 2011, when flooding on the Assiniboine River and on Lake Manitoba caused $800 million in damage. Water levels rose so high in Lake Manitoba that some beach front homes ended up three km into the lake
In millions of dollars: The top ten most expensive natural disasters in Canadian history (not adjusted for inflation.) The most expensive flood in Canadian history occurred in April 2011, when flooding on the Assiniboine River and on Lake Manitoba caused $800 million in damage. Water levels rose so high in Lake Manitoba that some beach front homes ended up three km into the lake © EM-DAT

Communities built on land that historically experienced mild flooding perhaps once every 100 years, are now being inundated regularly and severely damaged.

Cities have also changed

Phillips says that even if you took a similar violent storm from 50 years ago, cities and lifestyles have changed.  Green spaces in and around cities always help to mitigate weather conditions, but cities have grown, replacing green spaces with asphalt and concrete so the water is not absorbed but accumulates into a flood.

A coastal area once inhabited by only a few, now is completely covered with houses and cottages. With sea levels higher, and residences full of expensive hi tech tv’s and other gear, damage from that same storm of 50 years ago is necessarily increased.

Powerful winds whipped across Lake Manitoba, creating large waves that pounded the shore and crashed into homes and cottages.
Powerful winds whipped across Lake Manitoba, creating large waves that pounded the shore and crashed into homes and cottages. © CBC

The Insurance Bureau of Canada said insurance claim payouts from severe weather events were not notable prior to 2011.

They now average around $1 billion a year. In 2013, they hit a record high of $3.6 billion.

Phillips points out that global warming doesn’t necessarily mean shorter winters and more pleasant summers, but a greater number of extremes. He also refers to “weather whiplash” where you have too much rain one year, and not enough the next.

(photo at Lac La Ronge Saskatchewan 2015)It's been another record summer for forest fires across Canada due to changing climate conditions mostly in western and northern Canada where there has been less winter snow and drier summers in the pas couple of years.
(photo of Lac La Ronge Saskatchewan 2015) It’s been another record summer for forest fires across Canada due to changing climate conditions mostly in western and northern Canada where there has been less winter snow and drier summers in the pas couple of years. © Submitted by Scott Knudsen, Northscape Photography

Phillips says municipal planners should realize that building for the “new normal” while slightly more expensive at first, could really save money by enabling infrastructure to cope with the changed climate and thereby avoiding a very costly and potentially deadly weather disaster.

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