Rising temperatures due to climate change have led to a significant shift in seasonal electricity demand, particularly by increasing cooling demand during summer and reducing heating needs during winter. This shifting trend has been widely documented across regional and global studies. For example, Auffhammer et al. (2017) showed that electricity demand in the United States exhibits a strong nonlinear response to high temperatures, especially above 25-30 degC, driven mainly by demand for air conditioning. Similarly, De Cian & Sue Wing (2019) also confirmed this global trend that there are steep increases in demand where air conditioning adoption is rising due to climate change. Regional case studies, such as Garrido-Perez et al. (2021) and Bonkaney et al. (2023), have demonstrated that peak demand coincides more frequently with extreme heat days, stressing both power generation and distribution infrastructure. The anticipated rise in the frequency, intensity, and duration of heatwaves further amplifies these concerns, requiring investments in peak capacity, demand-side management, and adaptation strategies. Taseska et al. (2012) projected increased summer cooling demand across European regions due to higher temperatures, while Zachariadis & Hadjinicolaou (2014) confirmed a similar rise in cooling demand in Cyprus. Dirks et al. (2015) also found that seasonal peaks are shifting in the United States, with summer peaks becoming more dominant due to climate-induced changes in building energy use.
However, while winters are projected to be warmer, the demand responses are more variable. Romitti & Sue Wing (2022) introduced a classification of demand response profiles: a “V”-shaped response which is common in mid-latitude temperate cities such as those in North America and Europe, where demand increases at both high and low temperatures; an increasing response, where demand rises steadily with temperature, which can be typically shown in tropical cities; and an unresponsive profile, where minimal or no correlation exists between temperature and electricity demand. Pilli-Sihvola et al. (2010) used multivariate regression in Europe to estimate electricity consumption changes and found that Northern and Central Europe will experience reduced heating demand in winter, while Southern Europe will face increased cooling demand and higher costs in summer. This results in increased annual electricity demand in Spain, while it will decrease in Finland, Germany, and France. Although warmer winters are generally expected to reduce heating loads, the widespread adoption of heat pumps and other climate mitigation technologies may lead to increased winter electricity demand due to fuel switching from fossil-based systems to electric heating. Wood et al. (2015) analyzed how climate change could flatten winter peaks while enhancing summer peaks in the United Kingdom, suggesting that infrastructure planning should shift from winter-dominant to summer-dominant strategies.
The impacts of climate change on electricity demand show considerable regional heterogeneity, influenced by geographic location, climatic baseline, economic development, and infrastructure characteristics. A clear latitudinal pattern exists: countries at lower latitudes are projected to have higher increases in electricity demand for cooling, while higher latitude regions may observe mixed outcomes due to the opposing effects of warmer winters and hotter summers. Similar to the Romitti & Sue Wing (2022)’s classification, Hu et al. (2024) analyzed Temperature Response Functions (TRFs) across Europe by fitting the relationship between electricity demand and temperature to three types of curves: a linear decreasing curve for Northern European countries, a linear curve with a horizontal segment for cold and intermediate climate countries, and a V-shaped curve with a comfort zone for intermediate or warm countries, where both heating and cooling demands are affected.
Regional variations in electricity demand due to climate change across Japan show a clear dependency on latitude (Hiruta et al. (2022)) Northern regions, such as Hokkaido and Tohoku, will experience decreased annual electricity demand owing to reduced heating needs, whereas southern regions from Tokyo to Okinawa will see increased consumption due to extended cooling requirements. Transition zones near the boundary of the northern and southern regions present a balance between reduced heading and increased cooling demands, while these transition zones are shifting northward as climate warming continues. McFarland et al. (2015) also confirmed a decrease in HDD in the northern US, while the increase of CDD is significant in the southern US.
In tropical regions, where average temperatures are already high, even modest increases in temperature can trigger substantial rises in electricity use. Bonkaney et al. (2023) found that rising temperatures will affect electricity demand across all warming levels due to increasing air conditioning needs, with low adaptive capacity exacerbating system stress in Niger. De Cian & Sue Wing (2019) projected larger increases in energy consumption, primarily driven by higher frequency of extreme temperatures and the resulting increased cooling demand. However, in temperate regions, impacts on demand are mixed, varying based on local climate and socioeconomic conditions, as demand can either increase or decrease depending on local climate and geographic incidence of climate change (De Cian & Sue Wing (2019)).
Climate change impacts electricity demand across sectors in different ways due to sector-specific end-use patterns, varying weather sensitivities, and adaptive capacities. Therefore, understanding differences in electricity demand patterns across sectors is essential for ensuring grid resilience under changing climate conditions.
In the residential sector, electricity demand is particularly sensitive to temperature fluctuations, primarily due to the use of heating and cooling appliances to meet residents’ comfort expectations, which increase faster than the climate is changing (Wood et al. (2015)). De Cian & Sue Wing (2019) found that temperate regions, warming reduces heating needs, resulting in lower electricity consumption, especially in households using electricity-based heating systems, such as heat pumps. However, in tropical and warmer temperate zones, the demand for space cooling increases substantially with rising temperatures and humidity levels, leading to a net increase in electricity use in residential buildings. Berardi & Jafarpur (2020) emphasized that while heating energy use intensity may decline by 18-33%, cooling energy user intensity could rise by as much as 126% by 2070 in Canadian buildings.
The commercial sector is also highly climate-sensitive, primarily due to its dependence on heating, ventilating, and air conditioning (HVAC) systems. Taseska et al. (2012) projected that under a warmer climate scenario, commercial electricity demand for cooling would increase, especially during peak summer periods, while the reduction in heating demand would be relatively minor. Véliz et al. (2017) showed that commercial electricity demands would increase, driven not only by higher consumption but also by rising electricity prices. This suggests that the commercial sector faces both quantity- and price-based vulnerabilities under climate change.
The industrial sector shows more heterogeneous responses. Its demand is generally less directly related to air temperature, but certain processes, particularly those requiring climate-controlled environments, are affected by heat. Shaik (2024) showed that electricity demand in the industrial sector remains relatively price-inelastic and shows modest temperature sensitivity compared to other sectors. However, long-term changes in the demand may emerge through indirect pathways, such as workforce comfort requirements, advances in technology, or regulatory standards.
In the transportation sector, electricity demand is currently limited as the sector remains largely dependent on petroleum. However, with increasing electrification of transport systems, future electricity demand is expected to rise significantly (De Cian & Sue Wing (2019)). Shaik (2024) also noted that while the sector’s electricity use is still low, it is highly responsive to economic and price signals, suggesting future variability under combined climate and market pressures.