Naturally that heat wave had an impact on Arctic sea ice, which over the last couple of weeks has been at a record daily low. 2020 is starting to open up a sizable gap. According to the NSIDC's data the SIE has been lowest since 7/6 and is now 420,000 km2 below its 2nd lowest year of 2011, and according to the Japanese JAXA data this year's SIE is lowest since 7/3 and is 380,000 below their 2nd lowest year, which is last year.
From the Danish Meteorological Institute:
My own graph:
2020 is going to have to still melt strongly if it's to beat 2012's record minimum and build up a sizeable cushion, so when 2012 declined steeply in early August it will have something to ride on.