Problems people blamed on Y2K, but which had other causes:
Shortly before 9:00 PM in Los Angeles, news reports showed (via helicopter) a neighborhood power outage, affecting a thousand some-odd people. This was caused by rain, not Y2K. (The first rain in 6 months.)
US news reports showing fireworks in Eiffel tower in Paris said that upto 5% of the people in France were without power due to the massive storms that hit Europe.