* WHAT...Dangerously hot conditions with high temperatures and heat index values as high as 105 degrees.
* WHERE...Southwest and south central North Dakota, including the James River Valley.
* WHEN...Until 10 PM CDT /9 PM MDT/ Tuesday evening.
* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.
* ADDITIONAL DETAILS...Low temperatures will only fall to around 70 degrees tonight, providing little relief from the heat.