The man told his family on Monday he was going hunting in an area about 10 miles northeast of Cook. But his family became concerned when he failed to return home.
Thousands of firefighters and fleets of aircraft have been battling the deadly Thomas fire since Dec. 4. The fire has been fueled by dry conditions and untamed winds.
Quintana Roo state prosecutors said a preliminary manslaughter investigation indicated the driver lost control of the bus and when he tried to get back on the narrow highway, the bus flipped, struck a tree and landed in vegetation along the roadside.
Seven Americans and two Swedes were among the injured, Quintana Roo state Civil Defense spokesman Vicente Martin said. He said authorities hadn't yet established the nationalities of the dead.
No conclusions have been drawn as to the cause of the fire, which took out the airport's power supply and also its backup electricity for about 11 hours Sunday.
Delta Air Lines and other carriers that operate out of Atlanta's busy airport said they expected to be running normally Tuesday after a fire and blackout there forced the cancellation of over 1,500 flights days before the start of the Christmas rush.
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