Thanks for the update
I've done some research on power sources and distribution in Iceland. Reykjavik should be okay since it gets its power from hydro electric plants. Keflavik could lose power and hot water if Svartsengi Geothermal Power Plant is damaged or destroyed, and since that is were the international airport is that could cause big problems. Grindavik is indeed potentially in the path of the monster only a few kilometers away, and could suffer far worse than power and hot water outages.
Having visited this area myself it is more than detatched concern I feel.