 And the real thing that's going to boost this feeling is dew points. They're going to get into the 70s, maybe even upper 70s. A few models saying 80 degrees possible for the dew point in the Twin Cities on Sunday afternoon. Paul says the combination of heat and humidity could reach dangerous levels. One forecast model is showing a chance of heat index values at 110 in southwestern Minnesota on Sunday afternoon. Ahead of the heat, some wildfire smoke from Canada drifting into Minnesota causing hazy skies.