FIFA has told officials in Curitiba that they have until February 18 to prove they can get their stadium on track for the World Cup or risk exclusion from this summer's tournament in Brazil.
The 43,000-seater Arena da Baixada is so behind schedule that FIFA doesn't know when it might be ready. The organisation's secretary general said he will decide in three weeks whether to drop the city from the World Cup.
"As you can imagine, the current situation of the stadium is not something we really appreciate," Jerome Valcke told reporters on a visit to the ground. "The stadium is not only late, it is very, very late.
"If you don't have a stadium you can't have games," he added, describing it as an "emergency situation".