* WHAT...Dangerously hot conditions with high temperatures of 100 to 108 expected.
* WHERE...Portions of central, south central, and southeast Montana and north central Wyoming.
* WHEN...From noon Saturday to midnight MDT Saturday Night.
* IMPACTS...Heat related illnesses increase significantly during extreme heat events.
* ADDITIONAL DETAILS...Low temperatures are expected to be in the 70s for some locations east of Billings Saturday night bringing limited overnight relief.