Published: May 07, 2011 2:11 AM EDT
Updated: May 06, 2011 11:30 PM EDT

NAPLES, Fla. - Federal officials have spent $1.78 million in 10 days to fight the wildfire that has burned more than 26,000 acres.

Firefighters say while the wildfire at Big Cypress National Preserve is only 20% contained they estimate it will be 100% contained by May 18th.

"A typical helicopter is going to cost $35-$40 thousand dollars per day depending on how many missions it flies," said Jim Payne with the incident management team.

Fixed wing aircraft are seen from the air relaying information to the ground crews, which consist of at least 190 people per day working 16 hour shifts.

The fire was started on April 26th by lightning. Officials say recent rains have slowed their efforts to contain the fire but should not pose a problem in the overall effort.