A sinkhole that opened earlier in the month in the suburb of Cornelius collapsed further, rupturing underground power lines, The Charlotte Observer reported.
Power in the nearby Antiquity neighborhood was also out early Monday, authorities said.
Blown transformers in the city of Mathews Sunday afternoon left about 900 customers in the dark. Power was restored early Monday.
Duke Energy said it was working to resolves more than 600 power outages in Mecklenberg County.
Rainfall at Charlotte Douglas International Airport was measured 2.23 inches Sunday, breaking a record of 1.85 inches set in 1958.
The heaviest rain had moved into eastern regions of North Carolina. Forecasters said mostly cloudy skies and a chance of showers were expected every day for the rest of the week.