A FLOOD warning has been issued for the Tweed River with minor flooding expected this afternoon at Murwillumbah and Chinderah.
SES spokeswoman Joan Tulett said the volunteers were getting updates regularly from the Bureau of Meteorology as another rain system moved over the region.
"The flood situation may change but it depends on what happens in the next hour," Ms Tulett said.
"The prediction is that we will receive another 100mm today so there would be significant flooding with that extra rainfall.
"This rain was off the coast and started to move inland at about 4am (NSW). It will depend on how much further inland the system moves as to the level of flooding expected."
Ms Tulett said that the evacuation centres in the Tweed were closed but residents should remain alert and keep track of weather updates through the internet and radio.
Gold Coast City Council was also monitoring the latest rain cell over the city.
A Bureau of Meteorology severe storm warning for the Gold Coast issued early this morning has since been cancelled.
The area has already been battered with heavy rain.
The bureau reported rainfall of 115mm in the two hours until 6am (Qld) at Oyster Creek near Reedy Creek including 91mm in an hour.
The coast's local disaster coordinator Warren Day said the ground was already saturated from the rain earlier in the week.
"The Disaster Management Group is monitoring weather conditions and we need to be ready should the predicted intense rain come later this morning," said Mr Day.
"Areas such as Reedy Creek, Tallebudgera Creek and Currumbin Creek are of particular interest. As of 7.45am today, there was no need for any localised evacuations but we urge people in low lying areas to ensure they have their disaster kits prepared and an evacuation plan in place."
According to the bureau, rainfall intensity has increased in the Tweed Valley during the past six hours, with up to 70 millimetres falling during this period.