A strike would also impact employees at airports and marine ports of entry.
The clock is ticking down to an afternoon deadline for a new deal between the Public Service Alliance of Canada and the federal government.
There could be massive disruptions at Niagara's and the rest of Canada's borders if a strike by border workers goes ahead later today.
The two sides went into mediation on Monday but Canada Border Services Agency employees are set to begin job action at 4 p-m today if there's no deal before then.
The government says 90 per cent of CBSA front-line workers are deemed essential and cannot strike.
But union members could work-to-rule, slowing the flow of border traffic by doing their jobs exactly as outlined in their contracts.
A strike would also include employees at airports and marine ports of entry.

Man Dies in Lincoln House Fire
Potential Niagara Parks Strike
Man Charged with Possessing Child Porn
Be Wary of Spring Time Scams: NRP
Man Killed Walking Along QEW
Senior Charged with Hate Speech Crime
Medical Researchers Gather in Niagara
Province Passes Gov't Reform Act