Theyll be ok, basically its saving you from having to flush out your soil, since its doing it for you. Unless your pots have bad drainage or your afraid that the rain will bust them down, I really wouldnt worry about it and Id say theyll be alright. I have plants out side also and I dont really worry too much about them unless its a super strong wind that might brake them over. Hope this helps
*Disclaimer* All statements made above are purely fictional and hypothetically what I may do were I in that situation.