Unitil Corporation, a prominent provider of electric and natural gas services in New England, has officially entered into a three-year strategic partnership with Rhizome, a leader in AI-powered grid planning. This collaboration aims to revolutionize how the utility approaches investment planning by deploying advanced climate simulation tools to enhance grid reliability and resilience across its service territories. By integrating Rhizome’s proprietary software, Unitil seeks to better prepare for an era of intensifying climate-driven hazards, ensuring that its infrastructure can withstand the evolving threats of extreme weather, wildfires, and rising sea levels.
Under the terms of the agreement, Unitil will deploy Rhizome’s gridADAPT and gridFIRM planning tools within a unified software environment. This integration allows for a holistic assessment of multi-hazard risks, utilizing machine learning-based modeling to simulate future climate scenarios. The partnership comes at a critical juncture for the energy sector, as utilities face mounting pressure from both regulatory bodies and the public to justify capital expenditures while maintaining affordable rates for customers.
The Evolution of Grid Planning in a Changing Climate
The New England region, historically characterized by its predictable seasonal patterns, has undergone a significant shift in its risk profile over the last decade. While extreme winter weather remains a primary concern, the emergence of wildfire threats and prolonged droughts has introduced new complexities to grid management. Rhizome’s co-founder and CEO, Mishal Thadani, emphasized that the region’s utilities are increasingly adopting a "holistic" view of system risks. This approach moves away from reactive maintenance toward a uniform strategy of risk quantification across all potential hazards.
For Unitil, which serves over 215,000 customers across Maine, Massachusetts, and New Hampshire, the stakes are particularly high. The utility’s service area in Maine is increasingly vulnerable to coastal storms and the long-term impacts of rising sea levels. Meanwhile, New Hampshire recorded its driest summer on record in 2025, a phenomenon that has directly contributed to a surge in wildfire activity. According to state records, New Hampshire has seen more than 504 wildfires since 2021. While New England was not historically considered a high-risk zone for wildfires, the data from the last five years indicates a clear and dangerous trend that requires immediate technological intervention.
Technical Capabilities: gridADAPT and gridFIRM
The core of the partnership lies in the deployment of Rhizome’s two flagship software solutions. These tools are designed to bridge the gap between high-level climate science and granular utility asset management.
gridADAPT: Enhancing Resilience through Data
Rhizome’s gridADAPT tool is engineered to combine climate hazard projections with real-world operational performance data. By analyzing historical outages, asset health, and localized weather patterns, the software provides a forward-looking roadmap for resilience. For Unitil, this means the ability to identify specific "feeders" or segments of the electrical grid that are most likely to fail during a severe winter storm or a heatwave. The AI algorithms can simulate thousands of "what-if" scenarios, allowing planners to see the potential impact of a Category 2 hurricane versus a localized ice storm on specific pieces of equipment.
gridFIRM: Addressing the Wildfire Frontier
While gridADAPT focuses on general resilience, gridFIRM is specifically tailored for long-term wildfire risk management. In the context of New England, this tool helps identify areas where power lines may interact with dry vegetation during periods of high wind and low humidity. As wildfire threats migrate into non-traditional regions, gridFIRM allows utilities to prioritize vegetation management and equipment hardening (such as installing covered conductors) in the areas where the risk of ignition is highest. This proactive stance is essential for avoiding the catastrophic liabilities that have plagued utilities in the Western United States.
Regulatory Pressure and the Economics of Resilience
A primary driver for this partnership is the intensifying scrutiny from state-level utility boards and public service commissions. In Massachusetts and New Hampshire, regulators are increasingly requiring utilities to provide rigorous cost-benefit analyses for any proposed resilience-related capital spending. As the cost of labor and materials rises due to supply chain constraints, and as the demand for electricity grows through the adoption of electric vehicles and heat pumps, every dollar spent on the grid must be defensible.
Rhizome’s platform provides Unitil with the evidence-backed analysis needed to secure regulatory approval for critical projects. By grounding investment decisions in data, the utility can demonstrate that a specific upgrade will provide the maximum reduction in risk per dollar spent. This is a vital discipline in the utility sector, where the costs of infrastructure improvements are ultimately recovered from ratepayers. Ensuring that bills remain low while the grid becomes more reliable is a delicate balancing act that AI is uniquely equipped to handle.
Chronology of the Partnership and Rhizome’s Market Growth
The partnership between Unitil and Rhizome is the result of a broader industry trend toward "Climate Tech" integration. Rhizome, launched in 2023, has rapidly expanded its footprint by targeting the specific needs of utility companies grappling with climate uncertainty.
- 2023: Rhizome is founded with the goal of combining AI, climate models, and historical utility data to prioritize grid upgrades.
- 2024-2025: The company secures partnerships with major energy providers, including National Grid, Avangrid, Fortis, and Vermont Electric Cooperative.
- Late 2025: New Hampshire records its driest summer, highlighting the urgent need for wildfire-specific modeling in New England.
- October 2026: Unitil signs a three-year agreement to implement the full suite of Rhizome’s tools across its multi-state territory.
This timeline illustrates the speed at which the utility industry is adapting to new environmental realities. The transition from traditional planning methods to AI-driven simulation is no longer a luxury but a necessity for operational continuity.
Official Responses and Stakeholder Perspectives
The leadership at both organizations has expressed a commitment to long-term sustainability and customer protection. Sara Sankowich, Unitil’s Vice President of Shared Services and Sustainability, noted that the work with Rhizome is essential for understanding the specific climate risks facing their systems. "This work will help us make informed, cost-effective decisions that benefit our customers for years to come," she stated, highlighting the dual goals of resilience and affordability.
From a corporate perspective, the partnership also aids Unitil’s sustainability and corporate teams. Having reliable access to climate risk metrics is becoming a standard requirement for environmental, social, and governance (ESG) reporting. Investors and stakeholders are increasingly demanding transparency regarding how companies are mitigating physical risks to their assets. Rhizome’s platform provides a standardized way to report these metrics to both regulators and shareholders.
Broader Impact and Industry Implications
The collaboration between Unitil and Rhizome serves as a blueprint for the "Utility of the Future." As aging infrastructure across the United States reaches the end of its designed lifespan, utilities are faced with a choice: replace assets like-for-like or redesign the system for a more volatile climate. The use of AI allows for the latter, enabling a more surgical approach to grid modernization.
Furthermore, the partnership highlights the importance of "feeder-level" metrics. Traditionally, grid planning was done at a high level, often overlooking the vulnerabilities of specific neighborhoods or rural lines. AI allows for a "bottom-up" approach, where the specific characteristics of every pole and transformer are considered in the context of the surrounding environment.
As other utilities in North America, Europe, and Oceania look to bolster their defenses against climate change, the success of the Unitil-Rhizome partnership will likely be watched closely. The ability to quantify risk across multiple hazards—from the coastal flooding of Maine to the wildfires of New Hampshire—represents a significant leap forward in utility management. In an era where extreme weather is becoming the "new normal," the integration of artificial intelligence into the power grid may be the most critical tool available to keep the lights on and the transition to clean energy on track.
