Daily blackouts lasting around seven hours are hitting parts of Venezuela, disrupting homes, businesses and medical care, and fuelling protests against interim President Delcy Rodriguez's government, which is rationing electricity in some areas. Demonstrators have banged pots and pans, blocked roads and burned tyres, while patients such as a dialysis patient in Valencia say clinics' backup batteries and generators have failed. The crisis matters because it raises questions over how the government manages the country's vast oil wealth, a key source of national income.