Another way to make up for the lost power is that the voltage on the grid decreases slightly such that some loads simply consume less power for a short period. Things like heating load, and some lighting bulbs can consume less power with slightly lower voltage.,(reply>), Of course but spread over a lot of heaters it probably is hard to notice the difference and anyway presumably the power co will bring more generating capacity  on  line fairly quickly.,(reply>), you do realize that in a heating element reduced output might not be desirable ?