Winter Storm Fern offered a real-world test of critical infrastructure flexibility.
When Winter Storm Fern swept through Virginia the weekend of January 24-26, 2026, it created the kind of grid emergency that keeps utility operators awake at night. As temperatures plummeted and residents across the PJM territory cranked up their heat, electricity demand surged to critical levels.
Data centers are often cast as the villains in these scenarios—massive energy users that strain the grid exactly when communities need power most. But during Winter Storm Fern, NTT Global Data Centers (NTT GDC) demonstrated a different reality: with the help of Voltus, a demand response technology company, their facilities actually reduced grid strain during peak hours by switching to qualified backup generation, freeing up capacity for homes, hospitals, and essential services.
This wasn't an accident. It was demand response in action. And as extreme weather becomes more frequent, this kind of flexibility becomes increasingly essential.
Demand response pays businesses and residential customers to temporarily reduce or shift their electricity use during emergencies or peak demand periods. Think of it like paying flyers to take a later flight during a busy holiday. Demand response is valuable because it provides the equivalent of additional power plant capacity without the greater expense and time required to build new infrastructure.
As NTT GDC’s CEO, Doug Adams explained to curious neighbors and policymakers alike, data centers have three characteristics that make us natural candidates for demand response participation:
1. Predictable energy users. Unlike residential or commercial buildings with dramatic usage swings—think the 5 p.m. air conditioning surge or morning heating spike—data centers draw steady, consistent power. That baseline predictability actually helps grid operators plan more effectively.
2. Already have qualified backup systems. As critical infrastructure in the U.S., data center facilities are built with layers of redundancy, including the ability to automatically switch to generator power during emergencies. These aren't theoretical capabilities—they're tested systems designed for exactly this type of deployment.
3. Can shift seamlessly. When grid operators need relief during peak periods, data centers can move entirely off the grid to our backup generation without disrupting operations or compromising service to our clients. No one's data gets lost. No applications go down. The transition is invisible to end users.
Data centers are significant energy users, but they're also infrastructure investors. Large facilities fund their own substations, building high-voltage distribution capacity that ultimately strengthens the broader grid for surrounding areas. Every facility undergoes rigorous utility power studies before construction to ensure it won't burden local systems.
Increasingly, data centers are becoming active participants in grid management rather than just passive consumers. Demand response turns backup systems—which traditionally sat idle except during outages—into assets that support community resilience during emergencies.
As data center development accelerates and climate volatility increases, Winter Storm Fern offers a concrete example of what's possible when critical infrastructure, technology platforms, and grid operators work together.
Demand response is a proven, cost-effective tool that deserves more participation from facilities with the capability to help. The next time extreme weather threatens your region, the data center down the road might be part of the solution—quietly running on backup power so your lights stay on.
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