Yale Environment 360: An enduring high-pressure weather system over the Russian Arctic has led to a prolonged heat wave, creating conditions for another surge in wildfires a year after a particularly extreme wildfire season. NASA scientists say that a so-called blocking high system in which rain-bearing systems are blocked from moving west to east has caused temperatures to reach 90 degrees F (32 degrees C) in the northern city of Norlisk, where daily highs in July typically average 61 degrees F (16 degrees C)....