Parts of the Philippine capital Manila have been paralysed by floods, forcing tens of thousands of people to leave their homes.

Half of Manila has been hit by floods and the city is on the highest level of alert.

There are fears that the floods could worsen if the dam that holds back Manila's main reservoir spills more water.

More rain is forecast and rescue efforts are underway to help those stranded.

Several key roads are impassable and power has also been cut as a precaution in some areas, officials say.

Manila and the northern Philippines have been hit by bad weather since Typhoon Saola struck just over a week ago.

Many schools and offices have been closed, as well as the stock exchange.

There are strong currents in some of the flooded areas, making it difficult for rescuers to reach those stranded.

Half a month's worth of rain has fallen in the capital in the past 24 hours.