Thousands of north Queensland residents within a tropical cyclone warning zone are without telecommunications services after suspected copper thieves cut cables. 

Providers say some mobile and internet services have been affected for residents in the Townsville suburbs of Mt Low, Bluewater, Black River and Saunders Beach after fibre cables at a mobile site were cut. 

It comes as Townsville residents have been told to take shelter as an offshore tropical low pressure system has a high chance of developing into a category two cyclone on Saturday. 

tropical low map

The tropical low is forecast to develop into a cyclone on Saturday afternoon.  (Supplied: Bureau of Meteorology)

Optus said in a statement that the outages were caused by “an act of vandalism, which resulted in a significant break” at the Mt Low mobile site, which is also used by Telstra and the National Broadband Network.

Telstra regional general manager Rachel Cliffe said crews were working to bring services back online and any calls to Triple Zero (000) would automatically divert to any available mobile network. 

‘You can’t get a lower act’

While police have launched an investigation, Premier David Crisafulli condemned what he said was a “low act”. 

“Somebody has cut those telecommunications lines while trying to steal copper,” Mr Crisafulli said.

“My message to that low-life is that you have at risk the lives of north Queenslanders in their hour of need and you can’t get a lower act than that.”

David Crisafulli speaking

David Crisafulli says telecommunications are critically important. (ABC News)

He said telecommunications were critically important during natural disasters. 

“We intend to throw the book at this individual when they are caught because it’s a low act at anytime, but during a disaster that’s about as low as you can get.”

Townsville Mayor Nick Dametto said up to 5,000 residents could be affected. 

“This puts the community in a position, when important messaging needs to get out in the midst of a natural disaster, we’re unable to do that or we have a limited ability to do so,” Cr Dametto said.

Queensland warnings and information.

In an emergency phone Triple Zero

“What’s happened in the northern suburbs overnight is very disappointing … it’s the most un-Australian kind of thing that could happen.

“Stealing something, if that’s what’s happened, in the middle of a natural disaster is something that no-one should be proud of.”

Cr Dametto said technicians were doing the best they could to restore services. 

He urged all Townsville residents to prepare for the severe weather expected in coming days.

“We do remind people, go back to your cyclone kit, go back to your emergency kit, make sure your radio is in there … and make sure you’ve got plenty of batteries to keep up to date.”