Hundreds of volunteers, trained search and rescue crews, Winnipeg Police Service Air1 helicopter and police dog services have been assisting RCMP with the search for 2-year-old Chase Martens.

There's been no physical evidence found in the search for the missing boy, but that's not stopping volunteers and trained professionals from looking.

Searchers tell CTV News they're battling strong winds, chilly temperatures and challenging terrain. 

Fatigue is also becoming a factor for some searchers who have been looking since the search began on Tuesday. 

"I just want him found," said Kim Braun, a firefighter from nearby Lansdowne trained in search and rescue.

The RCMP said it will not be providing a media availability on Friday unless there is a major development in the case.

The search for Chase Martens resumed Friday morning at 9 a.m. after an overnight hiatus to give trained search and rescue personnel a break.

The RCMP has deployed drones to assist with mapping and photography of the search area which now covers a four kilometre radius around Chase's family's home.

They are asking anyone with aircraft around Austin to avoid the search area. Officers say if any small aircraft enters the search area, the drones will have to be grounded.

Chase Martens was last seen playing outside his home on Tuesday, March 22 around 6 p.m.

The two-year-old hasn't been seen since Tuesday night at 6 p.m. when his parents last saw Chase playing outside their home near Austin.

"Chase vanished without a trace," said a tearful Thomas Martens Thursday evening during an emotional plea to the public for information about his son's whereabouts.