# Record overnight temperatures expected across US cities Heat wave increases health risks with no nighttime relief - **Source:** [Phys.org - latest science and technology news stories](https://brifing.si/source/8b0f98da-d179-4c93-871f-7ac460bf9c61) - **Published:** 2026-07-14 - **Topic:** [Business](https://brifing.si/c/business) - **Original article:** - **On Brifing:** https://brifing.si/s/e5924085-86ef-414f-a9b6-78ce98069f42 ## Temperatures remain high Many US cities are expecting record-high overnight temperatures in coming days. This prevents body recovery after daytime heat exposure, significantly increasing health risks. ## Growing health threat Persistent nighttime heat poses serious risks especially for elderly and chronically ill populations. Experts emphasize hydration and cooling strategies. ## Energy systems under strain Continuous high temperatures increase AC usage, putting additional stress on power grids. Some areas face potential blackout risks. ## Climate change impacts Scientists note increasing frequency and intensity of such extreme weather events due to climate change. Global warming effects become more pronounced. ## Urban heat island effect Concrete structures and asphalt surfaces cause particularly high nighttime temperatures in urban areas, forcing city planners to implement new measures. ## Long-term solutions needed Experts stress the need for climate-resilient infrastructure and policies beyond short-term fixes to adapt to changing climate conditions. ## Sources covering this story - https://phys.org/news/2026-07-relief-cities-overnight-temperatures.html — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._