humidity

The graphic said wind gusts could reach 80 mph starting Jan. 7, which, combined with low humidity and very dry vegetation, created a major fire risk for L.A. and Ventura counties.

"As was the case 300 years ago, as we make these systems smaller, it will become easier to control the environment around them and isolate them from the effects of vibration, temperature, pressure, and humidity."

With the air so dry — and not moistening up overnight — it is a “really concerning period for humidities,” Kittell said.

The air is forecast to be extremely dry, with relative humidities under 10% through Friday.

Extremely low humidity levels — below 10% — will continue to plague the region, creating a ready source of dry fuel for any potential fire to feed on.