In the midst of COVID-19, it is easy to forget the host of other regulations and obligations with which businesses must comply in California. As summer temperatures continue to be high and winds pick up, one regulation to keep an eye on is Cal/OSHA’s Wildfire Smoke Protection Emergency Regulation (Section 51.41.1) which (among other provisions) requires employers to have on hand for their employees, N95 respirators when the AQI for PM2.5 hits 150 – or close down.