Subway systems are uncomfortably hot — and worsening
Peer-Reviewed Publication
Updates every hour. Last Updated: 2-Apr-2026 16:15 ET (2-Apr-2026 20:15 GMT/UTC)
First study to use crowdsourced comments to assess effects of heat underground. Researchers collected comments from X and Google Reviews published between 2008 and 2024. Study focused on subway systems in Boston, New York and London. As above-ground temperatures rise, below-ground thermal complaints increase. Knowing when people are uncomfortable could inform targeted interventions.