“Go inside. Close all windows and doors,” a phone message to residents near the Chevron plant in Richmond, Calif. said. The oil refinery fire has as of the moment not caused any injuries (all workers have been accounted for), but people are being asked to stay inside and turn off air conditioning and fans, and to cover cracks around doors to prevent any hazardous material from getting inside their homes. Pretty scary. (more here; photo by CatsMan2 on Flickr)