This story originally appeared on data-offer-url=”https://thebulletin.org/2025/12/shifting-storms-sweltering-summers-tehran-faces-future-day-zero-when-the-taps-run-dry/” class=”external-link” data-event-click=”{"element":"ExternalLink","outgoingURL":"https://thebulletin.org/2025/12/shifting-storms-sweltering-summers-tehran-faces-future-day-zero-when-the-taps-run-dry/"}” href=”https://thebulletin.org/2025/12/shifting-storms-sweltering-summers-tehran-faces-future-day-zero-when-the-taps-run-dry/” rel=”nofollow noopener” target=”_blank”>Bulletin of the Atomic Scientists and is part of the Climate Desk collaboration.
During the summer of 2025, Iran experienced an exceptional heat wave, with daytime temperatures across several regions, including Tehran, approaching 50 degrees Celsius (122 degrees Fahrenheit) and forcing the temporary closure of public offices and banks. During this period, major reservoirs supplying the Tehran region reached record-low levels, and data-offer-url=”https://www.theguardian.com/world/2025/jul/22/iran-limit-water-temperature-50c-and-reservoirs-depleted-extreme-heat-drought” class=”external-link” data-event-click=”{"element":"ExternalLink","outgoingURL":"https://www.theguardian.com/world/2025/jul/22/iran-limit-water-temperature-50c-and-reservoirs-depleted-extreme-heat-drought"}” href=”https://www.theguardian.com/world/2025/jul/22/iran-limit-water-temperature-50c-and-reservoirs-depleted-extreme-heat-drought” rel=”nofollow noopener” target=”_blank”>water supply systems came under acute…
