Asking people to limit use during peak hours isn't pleading. It was mentioned on the news but it wasn't made out to be as earth shattering as you made it sound.
If they run out of power, no big deal, you end up with the 30 min rolling blackouts....standard procedure.
Dunno about Alberta, but after the 4 day heatwave here in BC, everybody and their dog is installing a full bore HVAC setup. And they are all being sized to handle 42 C (108 F) here in Victoria. That alone will bump up the power demand by a bunch.
Toss in 100% EV cars..and poof, bye bye grid. 9 x homes hanging off of just 1 x 50 kva xfmr. And we all have...'200 amp service'..which is total bs of course. The 50 kva xfmr is only good for 200 amps period.
Meanwhile 2 x cars per home = 18 cars in total. 18 x EV cars, all sucking 6.3 kw all night long = 113.4 kw = disaster. Toss in AC requirements + normal electrical consumption in the home, and do the maths. The grid would have to be quadrupled to handle that load. That's a whopping 400% increase.
Meanwhile the greens, NDP, and raging grannies, local university students, enviro freaks, were all dead against the site C damn, that is currently under construction. "we have plenty of excess power". It was 70% completed when the NDP gained power...and they wanted it shut down..and asap. They even made that a campaign promise. In the end, it was deemed too expensive to shut down, plus the impending lawsuits from contractors etc, so it's still being built.
To handle a 400% load increase, they are gonna have to build 3 x more site C hydroelectric damns + 2 x nukes to even get close to reality. They (left wingers) all mean well, but have zero clue as to how simple grade school math works. And no, ur not gonna run any of this on solar or wind.
And the massive loss on tax revenue from declining sales of gasoline will result in massive increases in the annual car registration and licensing. The left wingers have a hate on for natural gas usage too, they want it shut down. Homes here in town that have 100% electric heat, + hot water, typ monthly bill is $500.00 Mine is $37.00 per month, then the small natural gas bill. $20.00 in summer (hot water)..and aprx $100.00 in winter (heat + hot water). BC Hydro sez if the gas line wasn't run over to Vancouver island back in 1992, the existing grid on Vancouver island would have been long gone maxed out.