Simplify the following text for a Grade 10 native English-speaking person.
Original: Brisbane Mayor Campbell Newman stated than about 20,000 homes would be affected when the river peaks on 14 January Newman also stated that the Brisbane River transport system had been `` substantially destroyed '' .
Simplified: Lord Mayor Campbell Newman stated than an estimated 20,000 homes would be affected when the river peaked on 14 January . He subsequently advised that the Brisbane River transport infrastructure had been `` substantially destroyed '' .