Hi there, is your humidity staying consistantly high? If so, this is quite normal of new humidors as they can take a while for the wood to stablise. What I'd suggest you do, is leave it open for a door or two, it won't do the cigars any harm so long as they are not exposed to excesive heat or daylight etc. Every day or so, close it up again and test the humidity. It will eventually drop back down again. How many cigars do you have in it? If you have a few, adding more will help to absorb some of the humidity.

With regards to the heat situation in Cali, that would only affect it in the opposite way to the problem you are describing. A hotter climate will actually dry out the humidor slightly, however I know nothing about how humid Cali is, but I wouldn't worry too much about that. Just try the first thing I suggested and let me know how you get on - good luck