Can Power Grid Support Popularity Increase Of Electric Cars?

Here's something I hadn't thought of: how are electric cars going to affect area power providers in the future? As prices drop, many more people are expected to purchase electric cars in our area. But if everyone plugs them in to recharge when they get home from work at 5:00, is that going to cause a draw on the available electricity? The Spokesman-Review talked to Avista about that in this article.