"If fire ignition occurs, conditions are favorable for very rapid fire spread and extreme fire behavior," forecasters said.

The National Weather Service on Wednesday extended the wildfire warning through the end of the week for much of East County.

The blaze ravaging across Los Angeles have killed 16 people so far, displaced thousands, and destroyed over 12,000 structures. The fires have burned through an area larger than San Francisco. The National Weather Service has issued red flag warnings for severe fire conditions through Wednesday.