Hampshire and the Isle of Wight are the first places to need new water sources.
For the next 10 years, we might need to introduce water restrictions there more often - possibly as frequently as every two to three years.
This is to make sure we can maintain essential supplies while we create new sources – including desalination works to clean seawater and treatment works to recycle wastewater.
Find out more about what is changing in Hampshire.
This also effects the Isle of Wight because the island receives water through pipes under the Solent.
We also may need to make similar changes in Sussex and Kent in the next 50 years.
However, all our plans are flexible, so we can adapt to housing growth, climate change and changes to our water sources as they happen.