The wildfire in Arizona continued to burn out of control Friday morning, threatening to cross into neighboring New Mexico.

Residents of Luna, N.M., located seven miles from the Arizona state line, have been ordered to evacuate their homes.

"When significant smoke and odor exists, residents in the Albuquerque area should avoid physical activity outdoors," Air Quality Division officials said in an alert.

"People with heart or lung disease, older adults, and children should remain indoors and keep activity levels low when they see or smell smoke," the advised.

Meanwhile, more than 3,000 firefighters continued battled the blaze that's become the second largest fire in Arizona's history.
  
The fire has burned more than 600 square miles, destroyed dozens of structures, and forced thousands to flee their homes.
    
One problem for firefighters - the fire is creating its own weather.

"The fire is so intense, it has so much heat, that it actually forms its own little thunderstorm at the top of the smoke plume," National Weather Service meteorologist Alex Hoon explained.

So far, firefighters have managed to contain only 5 percent of the blaze. 
   
The blaze was reportedly sparked by a camp fire, but overgrown ponderosa pine forests are feeding the flames.