according to deek arndt, head of climate monitoring for noaa, these record highs are, and i quote him here, almost entirely due to climate change, end quote. jack williams, a professor with the center for climatic research at the university of wisconsin, told nbc news -- and i quote him here -- heat waves of today are going to be the normal events of tomorrow. and where there's heat, there is apt to be fire. in the united states, wildfires rage on a remarkable scale. according to a new report by the major data analytics company corelogic, over 8.7 million acres burned in the united states in 2018. that is about the land area of the 75 largest cities in the united states combined. this summer, the arctic experienced a record-setting wildfire season. places that have not traditionally burned in parts of northern canada, alaska, greenland, and siberia were engulfed in flames visible from space. in this map, the north pole is about here. so this looks down at alaska here and russia here, the siberian arctic. and as you can see, fires were everywhere. guierrmo raine of imperial college lon