 Some of the natural problems include the arrival of a larva that strips barks from trees and residual problems from a forest fire in 1998, which destroyed about 450 hectares in the higher elevations of the park.Now there is a fire station called Brigada Regional Uno de la Delegación Cuajimalpa in the community of La Venta and an observation tower at San Miguel peak to watch for fires.There are also trees that are dying from acid rain.