Any visitors to the national park are getting blunt advice: "Travel prepared to survive." It's part of a heat wave that is forcing rolling blackouts in the West.
Dehydration has long been known to slow physical performance. Now there's evidence that too little water can hurt cognitive performance, too, making complex thinking tasks harder.
Multiple nuclear power facilities in Europe have reduced their electricity production because seawater, which is used to keep the reactors cool, has been warmer than usual.
Temperature records have been broken around the globe. In North America, tens of millions of residents have been under watches, advisories and warnings.
When canola seedpods shatter prematurely, farmers can lose a lot of their crop. Scientists have now figured out how this happens, and it has implications for similar crops facing global warming.