The Transmission Company of Nigeria said that the nation’s power generation capacity dropped from 3,959 megawatts on Jan. 4 to 2,662 megawatts on Jan. 22. The Nigerian Electricity System Operator website, a sub agency of TCN, disclosed the figure in its daily forecast on power generation data in Lagos on Sunday. TCN attributed the drop to low water levels at the hydro power stations and dearth of gas to the power generating companies.