 have a firearm at the time of the arrest in this case in October 23, but a firearm was found at a storage unit a month prior as part of a search warrant for the state-controlled substance offense, and we understand he had purchased another firearm from a local pawn shop the year before. It'll be up to the medical examiner to determine what killed a Texas man hiking the Grand Canyon, but indications are heat was a contributing factor. Heat cranks up this week in the deserts. As for rain, Ryan Worley with the National Weather Service in Phoenix takes a look at prospects for Tuesday and Wednesday.