Bitcoin (BTC) hash rate may finally be slowing down as miners face a scorching summer heat wave.

In fact, hashrate has already begun to decline after reaching an all-time high in March. As of June 17, it was down 10% to 589EH/s, according to Hashrate Index data. Since most miners are located in the United States, particularly steamy Texas, hashrate growth will likely be hit if companies in North America cease operations. “According to data from the University of Cambridge, approximately 37% of all Bitcoin mining occurs in the United States,” Blockware said. “As summer continues to heat up, it is reasonable to expect US-based miners to see their workload reduced due to the heat.”