Fanned by the hot , dry Santa Ana winds and minimal humidity , major fires were raging in at least 10 places , having already burned nearly 80 937 hectares .
Those hot , dry Santa Ana winds and minimal humidity created optimal conditions for raging fires in at least 10 places that have already burned nearly 200,000 acres .
At least 150 people are scheduled to testify at the hearings next week , with experts and activists lining up on both sides .