California's largest wildfire of the year is 12% contained, officials say

The video discusses the ongoing firefighting efforts in California, focusing on the Park Fire and Burrell Fire. Cooler temperatures and increased humidity have aided in controlling the fires, with over 4000 firefighters involved. The Park Fire, burning near Sacramento, presents challenges due to difficult terrain. Meanwhile, the Burrell Fire has scorched over 35,000 acres. The video also highlights the impact of wildfires on air quality across the Western United States. A positive note is the rescue of a Rottweiler and her puppies by a helicopter pilot.

What is the situation regarding air quality in the Western United States due to the wildfires?

What positive event occurred amidst the wildfires?