https://www.albertahealthservices.ca/assets/about/scn/ahs-scn-cc-quick-facts.pdf

The Alberta critical care community consists of 35 adult, cardiac, cardiovascular, paediatric and neonatal intensive care units operating over 700 beds in all five zones of Alberta Health Services

Over 700 ICU beds province wide. Excluding neonatal, etc, about half of those are available for covid patients. Not even remotely close to capacity or need for worry or emergency set up of extra beds.

https://www.alberta.ca/stats/covid-19-alberta-statistics.htm#comorbidities

Comorbidities. They matter. look how many are 3+ comorbidities.

https://www.alberta.ca/covid-19-alberta-data.aspx

Note the starred data points. The 138 ICU are a subset of the hospitalized. Not additional. Also, the total number of tests is 2.5 MILLION.

Let's look at h1n1 in 2009 for Alberta https://www.albertahealthservices.ca/assets/healthinfo/poph/hi-poph-surv-h1n1-ab-experience-2009.pdf :

During the second wave, the average number of suspect or confirmed pH1N1 influenza patients in critical care units was 50 patients per day (ranging from one to 110 patients a day)

Of note, the population of Canada at the time was about 30 million and we are at 40 million now. I dont know Alberta specifically, but its safe to say the population in city centres has grown significantly like other major cities in Canada and they still had similar numbers.