YOU’D BE HARD-PRESSED to dream up a nastier confluence of crises besieging California right now. Over the weekend, Tropical Storm Fausto propelled moisture from off the coast of Baja California up into the Bay Area, spawning rare summer thunderstorms. At the same time, the region has been baking under an intense heat wave that has desiccated vegetation, which all too easily combusted when those thunderstorms rolled through.