Heavy equipment going electric instead of diesel.

Just a simple country boy here and I have a question on electric vehicles. If everyone switched over to electric how would people in some areas of the country charge them considering that right now during high demand days some areas of our country have had rolling blackouts and brownouts. It would seem to me if everyone in those areas started charging eclectic vehicles daily then every day would become a high demand days and the current high demand days would go off the chart.