and the dave brubeck park. several other locations and most are starting at 9:15, 9:20. fireworks preparations underway at the municipal pier at aquatic park. that's one of two locations for the fireworks launch. the other location is a barge off pier 39. you're looking the mortar tubes which will hold the individual pyro- technics. they vary in size, and yesterday crews were assembling the containers for the tubes to get the best effect possible. as in years past, the shells will be set off electronically and the bursts of color will be choreographed to music. in all, some 8-to 10- thousand fireworks will fill the sky in just 23 minutes. the show begins tonight at 9-30. >> i cannot wait!and as grant just mentioned. you can watch fireworks from the comfort of your own home. join us for kron 4's july 4th live. it's the only local, live area. and best fireworks from san rafael, milpitas, pleasant hill and san francisco. coming up on the kron four morning news and here's a live look outside. san mateo bridge we are expecting a lot less traffic because it is the fourth of ju