Heat Advisory

* WHAT...Dangerously hot conditions with high temperatures up to 108 expected, and overnight low temperatures in the upper-70's. For the Heat Advisory, high temperatures up to 105 expected, with low temperatures in the mid-70s.

* WHERE...Arches/Grand Flat and Canyonlands/Natural Bridges.

* WHEN...For the Extreme Heat Warning, until 9 PM MDT Monday. For the Heat Advisory, from 9 PM Monday to 9 PM MDT Tuesday.

* IMPACTS...Heat related illnesses increase significantly during extreme heat events.