HOUSTON (March 25, 2008)

3:25 p.m. - Alex Valadka, MD, director of neurotrauma service at Memorial Hermann-Texas Medical Center, today began increasing the body temperature of Emilio Navaira from 33 degrees to 37 degrees C.

The team will warm Navaira at a rate of one-quarter of a degree per hour. He is expected to reach normal body temperature at midnight.

Physicians continue to monitor the pressure in Navaira's brain and will adjust medications as necessary.

The Grammy-award winning Tejano singer sustained an acute subdural hematoma, a severe injury to the brain, in a bus accident in Houston early Sunday. He underwent emergency surgery on Sunday morning at Memorial Hermann-TMC and remains in critical condition in a medically induced coma.

Dr. Valadka is also vice chairman of the Department of Neurosurgery at The University of Texas Medical School at Houston.