Sweltering conditions from a heat wave gripping Western Canada will present challenging conditions for firefighters in northern Alberta on Tuesday. Wildfire danger warnings spread across Alberta over the weekend with extreme temperatures and out-of-control fires in the northern areas of the province. The wildfire danger level is very high in the Fort McMurray forest area, where at least one out-of-control fire continues to spread. …No evacuation orders have been declared as of 10 p.m. MT Monday. Wildfire officials forecast a southwest wind of 15 km/h Tuesday, with winds expected to shift south in the afternoon at 20 km/h. Temperatures in northern Alberta are expected to climb to between 30 and 35 C and will persist until at least midweek, according to Environment and Climate Change Canada.  Several wildfires in the area were caused by lightning, all but are under control as of Monday evening.