Hamas and Fatah traded blame for the shortages of electricity in Gaza over the weekend.
Hamas blamed Fatah for not paying the fuel bills to Israel, resulting in a shortage of industrial fuel for Gaza's power plant. Fatah replied back that they do pay (most of) the bills, and Hamas shut down the plant in order to score political points.
Things are worse as this past week has been particularly hot in Gaza and the rest of the Middle East.
What is left unsaid is that Israel provides all the fuel Gaza needs - as long as someone pays. (Also, electricity directly from Israel - 120 megawatts a day - is not affected.)