Rain is on the way this week to Northern California, providing the possibility of some much-needed relief for areas ravaged by wildfires.

But the fast-moving flames may get a boost from hot, dry weather before the showers and cooler temperatures arrive.

Record-breaking hot weather, low humidity and wind have fueled California wildfires during this year's historic fire season, which has resulted in the deaths of 31 people and burned more than 4 million acres.

That's 26 times more than the number of acres burned in same period of 2019, according to Cal Fire, and is greater than the area of Connecticut.

There have been more than 8,300 wildfires in California this year. More than 16,600 firefighters continue to battle 23 major wildfires as of Monday morning, according to Cal Fire. The blazes have destroyed least 8,687 structures and air quality in the region has been an issue.

Red flag conditions have passed but high temperatures and low humidity are still creating difficult fire fighting conditions and challenging containment efforts, Cal Fire officials said.

The conditions resulted in 27 new wildfires popping up Saturday. Firefighters were able to gain the upper hand and bring full containment to all of the new blazes, Cal Fire said.

Temperatures remained warm Sunday but have been decreasing to become more seasonal, the update said.

Cooler weather and rain could help fire crews tending to the Zogg and Glass fires, which have been burning for more than a week in the northern part of the state.

"A front is pushing through the Pacific northwest today which is bringing cooler, drier air," CNN meteorologist Michael Guy said.

Following that, a storm system is expected to approach from the Pacific late Wednesday and Thursday, Guy said. A light rain could reach northern California mid-week, Guy said, with heavier showers Friday, lasting through at least the following Tuesday.

"Rain through this period will affect areas from San Diego to Seattle. However, the bulk of the rain will occur from the Mendocino area in Northern California to the Canadian border," Guy said.

"This should be something to help the firefighters contain the blazes."

>> Officials issue mandatory evacuations

The deadly Zogg Fire in Shasta and Tehama counties has burned 56,305 acres and is 76 percent contained as of Monday morning, according to Cal Fire. Four people have died as a result of the vegetation fire that started Sept. 27. The cause is still under investigation.

"There is still potential for active fire due to the hot and dry temperatures that have occurred over the past two months," according to an incident update.

One inmate firefighter remains hospitalized from an injury on Friday, fire officials announced over the weekend. The fire has killed four people.

Investigators are also working to determine the cause of the Glass Fire, which is burning in Napa and Sonoma counties. The blaze has grown to 65,580 acres since igniting Sept. 27. It is 30 percent contained, according to the Cal Fire incident website.

New evacuations were ordered Sunday in Napa County, where the Glass Fire continues to scorch wine country.