A major power outage, which hit Montenegro, Bosnia and Herzegovina, Albania, and most of Croatia's coast, has raised many concerns about the stability of electric supplies in the region. On the 21st of June, the electricity went down in four countries in the early afternoon, leaving people without air conditioning in the middle of the heatwave for hours. Power distribution is linked across the Balkans for transfers and trading. Initial investigation indicates the shutdown is caused by a sudden increase in energy consumption due to rising temperatures.