The Nothern Territory and federal governments are working to deliver disaster assistance to flood-affected Territorians.

The Australian Defence Force has evacuated more than 400 people by air, the Territory government confirmed on Thursday, while more than 600 people are being cared for at the Howard Springs Centre for National Resilience.

Financial support has also begun rolling out for residents affected by severe flooding in the communities and surrounding homelands in Kalkaringi, Daguragu and Pigeon Hole following heavy rain and strong winds from a slow moving tropical low.

The federal and NT governments are jointly funding assistance under the Commonwealth-State Disaster Recovery Funding Arrangements which includes: personal hardship and distress payments for eligible affected residents; temporary accommodation assistance; emergency home repairs; personal and financial counselling; rent relief for public housing tenants; and support for local councils and residents to help with clean-up costs and the restoration of essential public assets.

Northern Territory Chief Minister Natasha Fyles said communities were "dealt a harsh blow".

"The continuous heavy rain and flooding resulted in so many people having to be relocated to the Centre for National Resilience at Howard Springs," she said.

"The Northern Territory Government is working with emergency services and recovery coordinators to undertake disaster impact assessments to determine the full extent of damage sustained from this event.

"As the Territory Government, we have allocated $2.8 million towards our response and recovery. We are working with the Federal Government to ensure appropriate assistance continues to be provided to those people affected."

Federal Minister for Emergency Management, Murray Watt, said both levels of government are collaborating to deliver the best outcomes for NT residents.

"We are working in lockstep with the Northern Territory government to ensure assistance is delivered quickly on the ground," he said.

"We are monitoring conditions on the ground, whilst rolling out support as quickly as possible, and we'll continue to look at other types of assistance that may be needed."

"These disaster assistance measures will support those displaced and experiencing hardship during the immediate recovery from this event, and we will continue to assist with the long term recovery process."

Information on disaster assistance can be found on the Federal government's Disaster Assist website, and the Northern Territory government's emergency information and response Secure NT website.