Gov. Arnold Schwarzenegger has asked President George W. Bush to declare a state of emergency as fires continue to burn throughout California.

State fire officials said lightning strikes last weekend sparked 1,000 blazes across Northern California that so far have burned 302 square miles. More lightning storms are expected this weekend.

Schwarzenegger is requesting direct federal assistance. That would include air and ground firefighting crews, debris removal, and help evacuating and sheltering residents and animals.

Fire crews from 41 states have arrived to help California firefighters battle hundreds of blazes that are darkening skies over the Central Valley and San Francisco Bay area, reported KCRA-TV in Sacramento.

Schwarzenegger Won't Order Fireworks Ban

Schwarzenegger on Friday said that he does not plan on ordering a statewide ban of fireworks, reported KCRA-TV.

"Public safety is my top priority, and I want all Californians to enjoy the upcoming Fourth of July holiday, but also to celebrate it safely. I do not plan to order a statewide ban of fireworks, but I do encourage fire-affected counties to take a good look at their resources and take the appropriate steps at the local level, including a fireworks ban if necessary, to protect their communities and prevent any further aggravation of our state's already severe fire situation," Schwarzenegger said in a statement.

Meanwhile, another day of smoke-filled skies prompted advice from air-quality officials that people cancel or postpone outdoor activities.

"We acknowledge cancellation of these programs can be a hardship for all participants, and we appreciate those who have taken the step to put the health of their participants ahead of other considerations during this extended period of unhealthy air quality," Sacramento County Health Officer Glennah Trochet said.

The threat of fire has already led communities across Northern California to nix plans for Fourth of July fireworks displays.