On April 18, 2006, MODIS captured an image of numerous fires in Yucatan and Central America. Also including Guatemala and Honduras. The burning fires are marked in red and still active. At lower right, clouds mingle with smoke over the Gulf of Honduras.
At lower left, bright sunlight glints off the surface of the Pacific Ocean. February to May is the dry season in this part of the world, and these fires may be intentional agricultural fires set by people to prepare for the upcoming growing season.
Therefore during dry season you will see an increase in fires. Even with the agricultural being.