Harvest is estimated at 20 to 30 percent in the southeast part of Saskatchewan.
The regional crop specialist in Weyburn, Sherri Roberts, says crops are maturing quickly with recent hot dry weather.
She says yields are quite variable, depending on spotty summer rainfall.
She says the high temperatures raise concern about combine fires.
She also warns farmers about breakdowns and how quickly combine cabs can heat up if the air conditioning breaks down.
She suggests keeping a water bottle nearby.
Roberts says the hot weather could reduce some crop yields but there is more optimism about crops this year compared to last year.