On a Saturday afternoon in central Tehran, the hum of air conditioners suddenly ceased. In the neighbourhoods around Valiasr and Qaem Maqam streets, residents found themselves without electricity for more than four hours as the temperature outside touched 42°C. The state power distribution company later attributed the outage to a technical fault caused by increased load on the network. Repair crews were dispatched, and by evening the current was restored. But for those sweltering hours, the city’s rhythm was broken—a familiar interruption in the Iranian summer.

The heatwave that triggered the fault was not confined to the capital. Across the country, meteorologists recorded extremes that underscored Iran’s climatic diversity. In Ahvaz, the mercury reached 49°C, while in Shahrekord, nestled in the Zagros mountains, it dipped to 11°C. The national weather service issued yellow alerts for nine provinces, warning of strong winds and dust storms that would reduce visibility and air quality. In the eastern city of Zabol, the “120-day wind” stirred up clouds of dust, a phenomenon that has become more frequent and intense as drought persists. For Iranians, such forecasts are less a prediction than a seasonal certainty.

The blackout in Tehran was a reminder of the fragility of the country’s ageing electricity infrastructure. Official figures indicate that 13 per cent of generated power is lost in transmission and distribution—enough to supply 40 per cent of households. Yet public messaging places the onus on consumers, urging them to set air conditioners to 25°C and avoid wasteful usage. The managing director of the state power company had already warned that “we cannot get through the summer without blackouts.” In Mashhad, the electricity utility reported a new consumption record of over 2,000 megawatts and cautioned that if demand did not drop, forced load-shedding would be inevitable. The dynamic is a seasonal tug-of-war: a state appealing for restraint, and a public that views such calls with scepticism, aware of the grid’s deep inefficiencies.

Beyond the cities, the landscape itself seemed to rebel. In the eastern Zagros foothills, dust hung in the air over Qom, Markazi, and Isfahan provinces. The meteorological organisation warned of “severe to very severe” wind gusts in the western and southern fringes of Tehran province, with the potential to damage temporary structures and uproot ageing trees. In the Gulf, the seas were forecast to be rough. The heat, the dust, the wind—they form a trinity that defines the Iranian summer, a season that each year feels more punishing than the last. As night fell over Tehran and the power was restored, the city’s lights flickered back on, but the memory of the silence lingered, a quiet prelude to the next inevitable outage.