From Choctaw Emergency Management -
The combination of heat and humidity will reach dangerous levels Tuesday through Saturday of this week, with significant heat stress expected late week into early weekend. Heat indices will reach the 106 to 110 degree range for much of the area, while in the 111 to 115 degree range in the northwest Delta on Friday and Saturday. Residents should avoid prolonged outdoor activity, especially from the late morning through the afternoon.
Original source can be found here.