<Tr> <Td_colspan="2"> Location of fire in California . </Td> </Tr> <P> The La Tuna Fire was a wildfire that started on September 1, 2017, and burned 7,194 acres (2,911 ha) through the Verdugo Mountains in Los Angeles, California . It led to the destruction of 5 homes and the evacuations of over 300 homes . It was the largest wildfire in Los Angeles City in 50 years . </P> <P> Reported in the mid-afternoon of Friday, September 1, on the 10800 block of West La Tuna Canyon Road in Sun Valley, the La Tuna fire immediately burned north towards Interstate 210 forcing a complete closure of it . Fire activity was described as being erratic due to shifting winds which forced flames to jump both sides of the interstate as it began burning in four separate directions . By evening time of that Friday, the fire was an estimated 2,000 acres in size with a mere 10 percent containment . </P> <P> Los Angeles Mayor Eric Garcetti declared it a local emergency and called on Governor Jerry Brown to declare a further state of emergency . On Saturday, September 2, the fire endangered homes in Burbank, Glendale and Sunland - Tujunga . It is reported as the largest fire ever inside Los Angeles city limits . </P>

What was the cause of the la tuna canyon fire