* WHAT...Dangerously hot conditions with temperatures of 100 to 110 possible, warmest Sunday. A few all time record high temperatures are possible.
* WHERE...Portions of central, south central, and southeast Montana and north central Wyoming.
* WHEN...From Saturday morning through Monday evening.
* IMPACTS...Heat related illnesses increase significantly during extreme heat events.
* ADDITIONAL DETAILS...Extremely hot daytime temperatures combined with warm overnight low temperatures will produce cumulative heat stress. This heat stress will quickly become dangerous to anyone without adequate cooling and hydration.