catastrophic even deadly depending on exactly where and when it hits. including at what strength. they are asking the public to pay attention to official advice and orders. emily schmidt has more. >> reporter: florida's challenge monday with its picture perfect present was getting out word to prepare for a potentially dangerous future. tropical storm idalia is moving through record warm gulf of mexico waters. the national hurricane center warns that could lead to rapid intensification when winds increase at least 35 miles per hour in 24 hours or less. >> floridians should expect that this storm will be a major cat 3 plus hurricane. >> reporter: at least eight counties have issued mandatory and voluntary evacuation orders for some along the west coast. schools and colleges are closing, some navy ships leaving the area. hundreds of flights already canceled.

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