I want to transport water from point A ( let's say from sea ) to a point B ( let's say 1000m above sea level and 600 km far [400 km aerial distance]). The water is not required to be transported in h2O (liquid) state but any way that's cheap. De-salination if possible is good but not mandatory. What will be the cheapest way to do this. Even artificial rains can be an answer but how to do it effectively?

I am not sure if this was the best subreddit for my 4 AM questions but my city in India is facing water shortage, so wanted possible suggestions

Edit: Thanks everyone for the response. What I can understand, trucks are the only good and reliable short term solution. For long term pipeline may be a way.

Some facts asked: The population size is about 15 Million. But if you include nearby regions it may jump upto 20 Million. Water availability is about 40% less than required. Total water requirement in City is 2100 MLD ( million litre per day) so shortage is about 850 MLD.

Two years back we witnessed flood like situation and now drought like. Major issue is Lakes encroachment and deforestation. Plus El Nino and global warming has led to one of the highest temperature ever recorded in the city