1. The island that Sanji and co. had landed 7 chapters ago was indeed Zou. Compare the dense/thick fog surrounding the island in both these pics. You will find the similarity.
2. Now compare the below 3 pics:
I think the rain/water bulb thing that just poured on Sanji and co. was in actuality the water thrown by the big elephant via it's trunk. You can see the trunk in the 2nd pic from chapter 795. It looks like a volcanic phenomenon but I think it's what the elephant does from time to time.
this is from chapter 795:
And this from today's chapter:
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And this from today's chapter:
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2. Now compare the below 3 pics:
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I think the rain/water bulb thing that just poured on Sanji and co. was in actuality the water thrown by the big elephant via it's trunk. You can see the trunk in the 2nd pic from chapter 795. It looks like a volcanic phenomenon but I think it's what the elephant does from time to time.