Europe's energy system faces severe disruption as an unprecedented June heatwave forces power plants to cut output and sends wholesale electricity prices soaring. Record temperatures across France, Spain, and the UK have driven surging demand for air conditioning, overwhelming aging infrastructure. France's EDF reduced nuclear generation while Brittany left 70,000 customers without power after a transformer failure. Five major UK gas plants also cut output as cooling systems failed in 36C heat.

Power prices spiked dramatically, with Germany's market seeing prices jump from €86 to €566/MWh in a single day as evening demand surged and solar output dropped. The UK system operator paid roughly £1,379/MWh to import power, about 15 times the typical rate, due to low wind speeds and high demand. Analysts attribute the strain to an aging grid and power stations struggling with fossil fuel-driven heat.

High temperatures also lowered efficiency at solar panels and gas plants, compounding shortages. Experts warn this heatwave exposes Europe's vulnerability to climate change, with each degree of warming adding an estimated 1GW of consumption in France alone. The crisis highlights the urgent need for energy storage solutions as the continent races toward electrification.

The situation underscores how extreme weather is testing Europe's infrastructure ahead of its energy transition goals. With temperatures forecast to reach 40C across Germany and Austria, the message from energy officials is clear: the current system is unprepared for the climate reality already here.