Rain Rain Go Away...but please come again another day!

So I am all for the rain, reminds me of home. And don't we all know that Southern Cali needs a little precipitation, however I am supposed to run this thing called a 1/2 marathon in June and it is pouring outside. It's hard enough trying to get the motivation to run and now how am I supposed to train in this? Uggg. Can't the rain just hold off until tomorrow? Pllllleeeeaaaaasssseeee!!