Complex sentence: The highest temperature ever recorded was at the VVC weather station and in the center of Moscow and Domodedovo airport on July 29,2010 during the unusual 2010 Northern Hemisphere summer heat wave.
Split into simpler sentences: The highest temperature ever recorded was at the VVC weather station and in the center of Moscow and Domodedovo airport on July 29,2010. This happened during the unusual 2010 Northern Hemisphere summer heat wave.