Just how hot is it in the US right now?

Mark Memmott at NPR's "The Two Way" blog digs in to statistics and maps from the National Climatic Data Center to illustrate exactly how fucking hot it is in hundreds of cities around the US, as a record-setting heatwave continues. I found the data a little confusing, so I 'shooped up a "For Dummies" version for you all, above. But do read the whole post from Mark here. (via Dave Pell's NextDraft)