Ontario Provincial Police had hoped to resume their search for Christina Calayca this week, but had to cancel because of bad weather.

Calayca was last seen on the morning of Aug. 6, 2007 during a camping trip with friends at Rainbow Falls Provincial Park, about 180 kilometres east of Thunder Bay.

OPP Sgt. Deb Tully says seven members of the highly-trained Provincial Emergency Response Team (PERT) were expected in the Schreiber area on Monday to look for the missing 20-year-old from Toronto.

A poster for Christine Calayca, 20, of Toronto, who was reported missing in the Thunder Bay, Ont., area in August.
Canadian Press

"In the case of the Calayca search, we were going to be utilizing them to do some high-risk, rappelling-style of search. It's called high-angle rope search and rescue, and they [PERT] have a number of officers who are trained to a higher degree in that style of search," she said. 

Tully said the PERT members would have spent about five days checking areas that were too dangerous to access during the initial search.

She said the weather will now be the deciding factor when it comes to rescheduling the team's visit.
 
Tully said officers planned to look along steep cliffs, which could be very hazardous if they're covered in snow or ice.
 
Police and volunteers combed the woods for more than two weeks in August, but failed to find any trace of the woman.
 
Tully says this is still an open missing-person investigation, and is not considered a criminal investigation since no evidence has been found to suggest foul play.