币界网报道：Bitcoin's global hashrate has dropped by nearly 30% in the past week due to extreme heatwaves affecting mining operations and geopolitical tensions in Iran. Major mining hubs in Texas experienced power curtailments as temperatures exceeded 110°F (43°C), forcing some facilities to temporarily shut down. Meanwhile, Iran's bitcoin mining activities declined significantly following government restrictions amid electricity shortages and political instability. The total network hashrate fell from around 600 EH/s to approximately 425 EH/s, marking one of the most substantial short-term declines in bitcoin mining history. Analysts note this demonstrates bitcoin mining's weather sensitivity and geopolitical vulnerabilities, though the network's difficulty adjustment mechanism is expected to compensate for the reduced hashing power within two weeks. Some miners have begun relocating operations to cooler climates or exploring renewable energy solutions to mitigate future climate-related disruptions.