Pattern change in the U.S. especially featuring major precipitation events often is caused by presence of the Madden Julian oscillation or a tropical cyclone.
The NOAA fire danger forecast for June through September certainly highlights the West Coast as a primary target. The Northwest is most reliably in a danger zone given evolving drought. California observed a wet spring therefore the fire danger may evolve more slowly there. The Southeast fire danger eases due to short-term rains.
Labrador Current is colder than normal bringing frequent fogs and chill weather to coastal New England while robust warm Gulf Stream contibutes to the warm surge across the Mid-Atl;antic and Southeast States.