America's electric grid is in a bad state, and unless we also start improving it quickly, the extra load is going to cause problems.
Take California for instance. We're adopting electric vehicles rapidly, pushing for everyone to convert all their appliances and home systems to electric, and the increasing temperature is driving up air conditioning load every year. At the same time, our power distribution is falling apart and we have rolling blackouts throughout the state at the hottest point of the year. Not to mention that we're operating at a large energy deficit because of the shuttering of fossil fuel and nuclear plants before the renewable generation has even broken ground. By GWh, most of the under construction generation capacity in CA are natural gas turbines. While a major improvement over coal, it's still two orders of magnitude more CO2 produced per GWh compared to the nuclear plants they're replacing or the renewable plants we said we were going to build.