Just dumb luck mostly. They did hit 97 on 6/11/2019 and 98 on 6/12, so those stars almost aligned. Today's record was definitely low hanging fruit for them, but they should be able to easily break tomorrow's 95 as well.

I'm surprised the last decade hadn't nabbed a 90-meal yet for today's date

Something tells me this next winter is going to be brutally warmer than normal up there

AMOC slowdown reducing heat transport to the high latitudes probably

Pretty unusual for extended rounds of heat this early in the season anyway.