NEW : Bangkok will have to prepare for flooding . Nearly 9 million people are affected by flooding , authorities say . It is the country 's worst flooding in half a century . ` Officials predicted that water will enter northern Bangkok Friday . `` The situation is very uncertain as people are rushing to their homes to protect their belongings , '' said Natasha Cheung , who works in northern Bangkok for the Christian aid organization World Vision . ` The future is very uncertain , '' an aid worker says .
NEW : Bangkok will have to prepare for flooding . Nearly 9 million people are affected by flooding , authorities say . It is the country 's worst flooding in half a century . ` ` The future is very uncertain , '' an aid worker says .