If you were opting for long flowing hair but your hair frizzes at the mere mention of rain, it's worth having a back-up plan and going for an updo if it starts pouring on the morning of your big day. It'll be much easier to fix if you do get caught in the rain. Make sure you've got a bridesmaid on standby with cordless straighteners and smoothing spray so you can make the necessary touch ups. A veil might well come in handy if rain is likely, giving you an extra layer of protection. Oh, and make sure your mascara and eyeliner is waterproof, you might need it for more than just tears during the vows!