Unless the manufacturer says it is weatherproof body and lens, better put it under your coat or in your camera bag.
Your xe1 is not weatherproof. The Olympus omd em5 is along w/ the 12-50 kit lens it came w/. But the panasonic 20f1.7 is not.
Enough moisture in the wrong place can damage electronic components. If it does get wet, dry it off ASAP. If it is salt water get it to a repair facility. Salt water corrodes electronics as slow and very bad death unless corrosion can be treated immediately.
In any case when u get it wet, pull the battery and let it dry properly before putting battery back in. Modern cameras, the off may not really be off.. (Usually associated w/ cameras that have quick start feature in the past).
Gary