Three high-tech fire detection cameras are slated to debut in Napa County on Friday, adding an extra layer of potential prevention with wildfire season at its height. One is located on Atlas Peak east of the city of Napa, one at Clover Flat Landfill southeast of Calistoga and one on Diamond Mountain southwest of Calistoga. They are designed to provide early alerts for wildfires and cover much of Napa Valley. The artificial intelligence-based IQ FireWatch system can detect fires both visually and through heat disturbances. A third party is to monitor the information and alert Cal Fire’s Sonoma-Lake-Napa Unit Emergency Command Center of potential wildfires. “Early detection is the best defense with these types of active fire calls,” Napa County Fire Chief Jason Martin said. It remains to be seen whether the system will be a game-changer through the end of fire season. The system is getting a kind of test run as the county ponders future options.