A brush fire started on a sweltering day east of Lake Piru in Ventura County and led to evacuations as this week’s warm temperatures in Southern California reached their peak. The Canyon Fire was estimated at about 50 acres early Thursday afternoon before quickly spreading to more than 4,

The Canyon Fire in Southern California has spread to more than 5,300 acres and was 25% contained, a day after igniting outside of Piru, CA.

The Canyon Fire ignited Thursday afternoon and grew to more than 7.6 square miles (19.7 square kilometers) by 11 p.m., according to the Ventura County Fire Department.