At least once a day, the hum of every fan, air conditioner and fridge across Egypt goes quiet. The lights go out and an expletive is muttered or hurled into the quickly-heating air.
Lifts stop, errands are cancelled and meetings delayed for as long as the power stays out — hopefully an hour or two, but recently even longer.
It is now a year since energy and foreign currency crises led Egypt’s government to institute planned blackouts known as “load shedding”.
But the measures have not been felt equally across the country.