Evaporative drought demand index did a good job recognizing the fire risk to Canada and maintains a dry atmosphere/soil moisture combination into the northeast quadrant of the U.S. during early June.
Until the waters off the East Coast warm significantly, the tendency for cool temperatures in the East U.S. with very limited number of warm-to-hot days will continue into mid-summer.
Exceptional climate regimes require a close review as to their catalyst to understand how the pattern developed to help mitigate risk, if possible, to similar future circumstances. The record-strength Canadian fire season of 2023 (so far) was caused by a set of unique circumstances all occurring at once to promote a flash fire acceleration during mid-to-late spring 2023.
A combination of climate factors caused an upper-level high-pressure ridge in Canada to amplify attendant drying character from West Canada to the Great Plains during May.