That happeneed me last week. The ride into work was perfect, really sunny and not much wind and then got drenched on the way home with a headwind too. Got a bit of a chill after that and still have the sore throat to show for it. I actually broke 2 spokes. I was standing at the kerb waiting to fly across the road and i heard a big pop and the wheel started wobbling. I was able to true it myself after i put the new ones in. Not quite perfect but doable
I'm sure sheldon brown has some infor regarding truing wheels.