People are using this fearmongering tactic without even doing the math. Estimates projecting 4 million electric cars in California by 2035 suggest it will increase electricity demand by around 3% to 6%. That's like one power plant. Even if we converted to 100% electric cars (which is decades away), it would only be about 25% increase on the grid and the vast majority will be in off-peak hours. That's easily attainable 20-30 years from now.
Forbes ain't exactly some treehugger outlet yet they say worrying about electric car load is mostly fearmongering:
One of the most frequent concerns you will see from electric vehicle haters is that the electricity grid can’t possibly cope with all cars becoming EVs. However, they haven’t done the math properly. The grids in most developed nations will be just fine. Here’s how.
www.forbes.com
The problem with the heat wave is that it creates a situation where for brief periods EVERYONE is ramping up their use on certain hours of certain days. That's mostly AC and fans use along with other household and factory work, all of which occurs in the late afternoon and early evening heat.
Electric cars ain't like that, because its easy as fukk to charge them at night and 99% of the population doesn't burn through a full charge in any given day. If anything people are driving during peak use, there's no reason to charge during that late-afternoon peak unless you planned poorly. All you have to do is make sure that people are incentivized to do their charging during the off-peak hours and then the cars will hardly affect that peak grid draw at all.
And, ironically, by fear-mongering against electric cars you're just promoting more gas-burning, leading to more global warming, leading to more heat waves, leading to more AC use, leading to more blowouts of electrical grids....but you're fear-mongering the effects without dealing with the actual problem that causes this shyt, which is burning fossil fuels.