just waiting for the fire call to come in. >> reporter: the captain is with cal fire based in san matteo county. >> it's typically around skyline here. we see a lot of fires along highway 35. and along the vista points along 280 as well. >> reporter: back in san bruno, where the safe and sane fireworks are allowed, the vendor said that the proceeds help community nonprofits. >> for the legion and marine corp league, we help veterans. this man plans to be extra careful. his hope for everyone's celebrations this year -- >> just safe and everyone enjoy without problems. >> happy fourth. >> reporter: kpix5. >> reporter: fourth of july happenings are happening as covid spiking again. last check, california's test positivity rate shot up to just shy of 15% and that's up from about 13% last week. it's all fueled by new virus strains that are highly contagious but generally won't cause you serious diseases if you are vaccinated. >>> if you are somebody who is unvaccinated, or older in particular, and unboosted, you are going to have a higher chance of dying regardless, even though omicron is billed as