The Bureau of Meteorology [BOM] is warning of very dangerous rainfall and life threatening flash floods on the Northern Rivers.
BOM issued a Severe Thunderstorm Warning for Intense Rainfall for parts of NSW including the Northern Rivers around 9.45am Monday.
The bureau said the warning applied to the next several hours to people in Byron Bay, Ballina, Tweed Heads, Murwillumbah, Lismore and Evans Head.
The same warnings were in place for parts of the Riverina and Lower Western districts.
The storm warnings came just hours after state emergency services issued major flood alerts for all major river systems on the Northern Rivers including the Brunswick River and Marshalls Creek, Richmond River, Tweed River, Clarence River and Wilsons River.