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Instead of having to prove that climate change did affect a heat wave, Dessler explained, the burden of proof is now on any scientist to prove that global warming didn’t play a role. “Now, if we have an extreme heat wave, the null hypothesis is, ‘Climate change is making that worse,’” said Andrew Dessler, a professor of atmospheric sciences at Texas A&M University. In Portland, light rail cables literally melted amid record-smashing temperatures up to 40 degrees Fahrenheit above normal.Īnd some scientists are beginning to say that not only is the once-in-a-millennium heat wave broiling the Pacific Northwest linked to climate change - but that it’s safe to assume that all heat waves are being made more severe or more likely as a result of all the carbon emissions pumped into the atmosphere. In Seattle, fans and air conditioning units were sold out at major retailers as temperatures reached an all-time high of 106 degrees Fahrenheit, marking an unprecedented third straight day of 100-degree heat. On Monday, temperatures in Washington and Oregon soared to well over 100 degrees Fahrenheit, crushing records and leaving locals - many of whom don’t have air conditioning - struggling to find shelter from the suffocating heat. There’s no longer any need to ask if heat waves are influenced by climate change.