Another Invasion of Painted ladies on the cards?

Following the invasion of Painted lady butterflies earlier in the year I have recently found a couple of arable fields near Camrose with un-treated margins with plenty of creeping thistle. Almost all of the plants have been heavily eaten by Painted lady caterpillars. There must have been thousands of caterpillars here. Has anyone else noticed the same thing? Perhaps we can expect to see a second wave of this species soon?