FUSED
You It's understood, though not specifically stated. The sentence is imperative - a "command". It could have been written: You, get away from the water during a storm.
My father drank purified water
As with all dogs, it depends on the individual, I have known Dachshunds that love water but unfortunately the ones I have owned hated it (although they could swim).
A sentence using the word Water tight could be "Is this seal watertight?" .
water is a nonflammable source
I could see water vapor escaping from the boiling pot.
The Earth is predominantly made of water.
The sentence could be correct if it followed a context sentence such as "Changing where the water is poured could help one plant to live." Otherwise, the word "but" makes this a dependent clause, not a sentence.
Dehydrated means your body lacks the water it needs so a sentence could be; "After seven days in the desert without water he was dehydrated".
An intensive property is one in which the property of matter does not change as the amount changes. A sentance could be: The intensive property of the liquid did not appear different even though we added more water to the container.
I loosened the cap and poured the water into the cup.
You could see the excitement of the four year olds as they played in the water.