Simplify the following text for a Grade 11 native English-speaking person.
Original: The lake flooding has displaced 6,000 people from upstream villages , stranded ( from land transportation routes ) a further 25,000 , and inundated over 12 m of the Karakoram Highway .
Simplified: The lake flooding has forced 6,000 people to move from upstream villages , stranded ( from land transportation routes ) a further 25,000 , It inundated over 12 m of the Karakoram Highway .