A massive
grassfire south of Tracy has grown into 15,000 acres of burning brush,
and fire officials expect it to continue to spread eastward and
continue burning through Sunday.

On
Saturday, Alameda County Fire Department spokeswoman Aisha Knowles said
the Corral Fire is 50 percent contained and is not growing.

She
said the winds, which were up to 30 miles per hour when the fire
started to grow, have died down to about 2 to 6 miles per hour this
morning.

However, Knowles said, the winds have shifted from
northeast to northwest, which could affect humidity and change the
fire's temperament.