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Severe weather and major power outages increasingly coincide across the US

Nationwide patterns of severe events provide crucial data for hazard response and mitigation

2025-01-22
(Press-News.org) An understanding of the relationship between severe weather and power outages in our changing climate will be critical for hazard response plans, according to a study published January 22, 2025 in the open-access journal PLOS Climate by Vivian Do of Columbia University, New York and colleagues.

Throughout the United States, large-scale power outages commonly occur alongside severe weather events. These combined events can be associated with major economic costs and health risks, as loss of power can disrupt medical equipment, heating or air conditioning, and other important systems. As severe weather events increase in severity and frequency due to climate change, understanding the patterns and distribution of these outages is critical for community preparation and resource allocation.

In this study, Do and colleagues compiled data from 2018-2020 on severe weather events (including rain, snow, heat, cold, cyclones, and wildfire) and large-scale power outages lasting eight hours or more for over 1600 counties across the United States. The data reveal that nearly 75% of these counties experienced major power outages alongside severe weather events during this three-year period, and over 50% of counties experienced outages alongside multiple simultaneous weather events.

Outages most commonly occurred alongside severe precipitation and heat, but the events are not distributed evenly, with precipitation-associated outages more common in the Northeast US and heat-associated outages more common in the Southeast. This study also found that co-occurring outages and wildfires along the West Coast became increasingly common from 2018 to 2020.

The researchers note that reliable data was not available for all US counties, so information is limited in regions such as the Southwest and Mountain West. Do and colleagues suggest that further research providing additional data, along with simulations of severe weather combinations in different locations will be useful for developing mitigation and response tactics.

First author Vivian Do adds: “Power outages frequently co-occur with severe weather events like heavy precipitation, tropical cyclones, or multiple severe weather events simultaneously. Understanding patterns of where and when power outages and severe weather events co-occur is crucial for informing strategies to minimize societal consequences, especially as the electrical grid ages and climate change drives more severe weather events.”

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In your coverage please use this URL to provide access to the freely available article in PLOS Climate: https://journals.plos.org/climate/article?id=10.1371/journal.pclm.0000523 

Citation: Do V, Wilner LB, Flores NM, McBrien H, Northrop AJ, Casey JA (2025) Spatiotemporal patterns of individual and multiple simultaneous severe weather events co-occurring with power outages in the United States, 2018–2020. PLOS Clim 4(1): e0000523. https://doi.org/10.1371/journal.pclm.0000523

Author Countries: United States

Funding: This work was funded by the National Institute for Environmental Health Sciences (NIEHS) P30 ES009089 (JAC), 5T32ES007322-22 (VD), and P30ES007033 (JAC), the National Institute on Aging (NIA) grant RF1AG071024 (JAC), and the National Heart, Lung, and Blood Institute grant F31 HL172608 (VD). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

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[Press-News.org] Severe weather and major power outages increasingly coincide across the US
Nationwide patterns of severe events provide crucial data for hazard response and mitigation