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Hundreds of U.S. counties set high temperature records this winter

A choropleth map of the U.S. showing counties with record high average temperatures between December 2025 and February 2026, over 131 years of record-keeping. 

Counties with record high average temperatures between December 2025 and February 2026

🧠 What you need to know before upgrading your HVAC system

Why oil price spikes (probably) won't lead to lasting shift

Why the Iran crisis is a mixed bag for clean energy

Google, Amazon, others team to cut climate "superpollutants"

Winters are getting shorter across most U.S. cities

A U.S. map showing the change in average length of consecutive winter days from 1970-1997 to 1998-2025. 15 metro areas experienced 20 fewer days of winter, including Juneau, Alaska with 62 fewer days. Only metros experienced 20 more days: Eureka, California (50) and Monterey (46).

Change in the average length of winter

Data: Climate Central; Note: Winter temperature threshold based on the coldest 90-day window; Map: Jacque Schrag/Axios

With investing, AI's gain may be energy's loss

A line chart shows annual investment in energy technology innovation and AI by large VCs from 2018 to 2025. Energy tech investment rose from 6% in 2018 to a peak of 17% in 2024, then slightly dropped to 16% in 2025. AI investment grew steadily from 2% to 22% over the period.

Share of investments by large VCs in energy technology innovation or AI startups

Data: IEA; Note: Based on 50 corporate, financial and VC investors deploying $1 billion overall and $100 million or more in energy innovation since 2020; Chart: Axios Visuals

Winter sports boom faces a climate reality check

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