SACRAMENTO, Calif. — Californians working indoors are getting immediate protections from extreme heat as much of the state bakes in triple-digit temperatures this week. California has had heat standards on the books for outdoor workers since 2005, but the state announced Wednesday that a set of rules for indoor workers had been finalized following an expedited review. The state’s Occupational Safety and Health Standards Board approved the regulation last month, but it needed to be vetted for legal compliance. “This regulation provides protections for workers across California and helps prepare…