* WHAT...Temperatures of 95 to 100 degrees expected.
* WHERE...Portions of central and south central Montana and north central Wyoming.
* WHEN...Until 9 PM MDT Sunday.
* IMPACTS...Heat related illnesses increase significantly during extreme heat events.
* ADDITIONAL DETAILS...Hot daytime temperatures combined with warm overnight low temperatures will produce cumulative heat stress. This heat stress will become dangerous to anyone without adequate cooling and hydration.