Several Southern California communities, including Riverside, are being hit with smoke from the huge Line Fire in the San Bernardino Mountains, creating what the Environmental Protection Agency classifies as “very unhealthy” air quality. Several Southern California communities, including Riverside, are being hit with smoke from the huge Line Fire in the San Bernardino Mountains, creating what the Environmental Protection Agency classifies as “very unhealthy” air quality. Environment Phys.org – latest science and technology news stories