Tucson Electric Power has issued an explanation of how it restores electrical service and meets heightened customer demand during stretches of extreme heat affecting the Tucson area. The utility’s communication addressed the processes and considerations it uses to respond to outages and the increased loads that can accompany very hot weather.
Tucson Electric Power substation showing high‑voltage switching equipment and lines used to distribute electricity as the utility prepares for increased demand during extreme heat.
In its explanation, Tucson Electric Power focused on two central concerns for customers during heat events: restoring power when outages occur and ensuring the system can meet elevated demand. The utility described its overall approach to both issues, noting the importance of timely restoration and careful demand management to maintain reliability for households and businesses across its service territory.
The utility’s statement emphasized an organized response to outages and system stress during extreme temperatures. It set out how it approaches service restoration and how it considers customer needs when demand rises. The explanation was intended to clarify the company’s actions and to inform customers about what the utility does in challenging weather conditions.
Tucson Electric Power outlined the roles of its operational teams and the utility infrastructure in responding to high-demand periods and outages. The company described how it prioritizes different facets of reliability and restoration to serve affected customers. Its description aimed to make clear the factors that guide the utility’s decisions and operations when the grid faces strain from heat-driven consumption.
The utility also discussed its communication with customers regarding both ongoing demand conditions and restoration timelines. Tucson Electric Power’s explanation included references to how it keeps customers informed during outages and heat events, with an emphasis on providing updates that help households and businesses plan and respond while crews work to restore service.
In addition to restoration and communication, Tucson Electric Power addressed how it meets surges in demand that occur during prolonged hot spells. The utility described the steps it takes to balance supply and demand on its system to maintain service for as many customers as possible. Its account conveyed that managing demand and restoring service are interrelated components of its operational strategy in extreme heat.
Tucson Electric Power’s public explanation was presented to give customers a clearer picture of the utility’s preparations and actions during extreme heat. The company framed its approach around reliability, restoration, and keeping customers informed, underscoring the challenges that elevated temperatures can pose to electrical systems and the importance of an organized response.
The utility’s message to Tucson-area customers aimed to convey that it has established procedures for restoring power and handling increased demand during heat events. Tucson Electric Power’s explanation served to outline its priorities and operational focus when temperatures are high and the electric system experiences heightened stress.
At a recent briefing to state regulators, Tucson Electric Power and peer utilities warned that rising extreme heat, population growth, and supply-chain challenges could lead to blackouts in coming summers, cautioning that their current positive outlook on meeting peak demand may not hold long-term. (Arizona Technology Council)
Tucson Electric Power serves roughly 457,000 electric customers across about 1,155 square miles of Southern Arizona, giving a sense of the scale of customers affected when the system is under heat‑related stress.
This year TEP brought its Roadrunner Reserve battery system online — a 200‑megawatt, 800‑megawatt‑hour installation that TEP says can power about 42,000 homes for four hours — and the utility has used that storage resource during recent peak hours to reduce purchases and support reliability.
TEP reported a new local peak demand record of 2,502 megawatts between 5 and 6 p.m. on Aug. 6, 2025 (and a near‑record 2,501 MW the following day), with those peaks driven by 111–112°F temperatures.
The company has filed a rate review with the Arizona Corporation Commission that would take effect in September 2026; TEP says the proposal would raise typical residential bills roughly 13–14% to help recover investments (including about $350 million tied to Roadrunner Reserve) and roughly $1.7 billion the company says it has invested since 2021 in grid improvements.
Arizona’s regulator enforces a summer disconnection moratorium (June 1 through Oct. 15, 2026) and utilities can also invoke weather‑based protections when the National Weather Service predicts especially dangerous heat, limiting disconnects during the hottest months.
TEP has also leaned on customer demand‑response programs: its Smart Rewards program was called multiple times this summer (eight events reported), and TEP says participating customers reduced load by about 26 megawatts on average during the first hour of those events.