The Samoa Disaster Management Office says rivers throughout the country have overflown their banks, and the public is being warned to not attempt to cross them.
It says the flooding is due to the amount of rainfall experienced over the past 24 hours.
The office says there is also a landslide along the Lemafa area and the Ford crossing at Tiavea tai has overflown and has been closed.
Flooding is also reporting along East Coast road, and a landslide earlier this morning at Solosolo has since been cleared.
The Disaster Management Office is urging the public to use alternative routes for travelling, to slow down and remain vigilant as roads are slippery and dangerous.
Heavy rain continues in American Samoa
There have been landslides, flooding and other incidents caused by heavy rain across American Samoa overnight and early today.
A flash flood warning issued before six this morning has been is extended to three pm, a wind advisory continues until tonight as does a high surf advisory.
American Samoa got more 110 millimetres of rain this morning.
The last week of 2015 may set records for rainfall in American Samoa.
Authorities have urged drivers to not try and drive through and against currents and those living near streams are advised to temporarily move away.
Meteorologist Carol Maafala Baqui says a South Pacific convergence zone, which also acts as a trough, is responsible for the incessant downpours since the weekend.