The City woke to thunderous headlines this morning as National Grid confirmed a record surge in electricity following a series of violent lightning strikes across southern England. For those of us who trade in certainty, this was a sharp reminder that even the most sophisticated grid can be humbled by nature. The surge, which triggered automatic safety cut-offs at several substations, briefly left parts of Kent and Sussex in darkness.
Market reaction was immediate: day-ahead power prices spiked by 12 per cent in early trading before settling back. This is not just a weather story. It is a fiscal and infrastructural stress test.
Every lightning strike that knocks out a transformer is a devaluation of our national capital stock. The Treasury will no doubt be tallying the repair bill, but the real cost is in lost output. Gilt yields barely moved, suggesting the market views this as a transitory shock.
But I am not so sanguine. Our grid was built for a different climate. As storms become more frequent, so too will these unplanned disconnections.
The cost of resilience grows with every bolt. Investors should watch the 'storm premium' in energy futures. If the volatility persists, it will feed through to inflation expectations.
The Bank of England may yet have to factor in ‘weather risk’ alongside Brexit and energy prices. For now, the lights are back on. But the economic clouds remain.
