In Utah, humidity as low as 5% is possible along with gusts up to 35 mph which would allow for new and existing fires to grow rapidly. These fire conditions have allowed the Dragon Bravo Fire on the north side of the Grand Canyon to explode this week, now burning more than 94,000 acres and containment falling to just 4%.

Heavy rain is expected to bring dangerous flooding, disrupt commutes and trigger emergency measures across the region.