SAN DIEGO  — As the threat of wildfires has grown to a staggering level in California, so has its network of high-tech cameras watching the backcountry to spot the first outbreak of flames and help firefighters battle them until they are contained.

The 610th ALERTWildfire camera was installed in California last month, according to the program office at the Scripps Institution of Oceanography at the University of California, San Diego.

The size of the multi-state system almost doubled in the past four months, primarily in California, where more than 4.1 million acres  have burned this year. There are also 41 cameras in Nevada, nine in Oregon, six in Idaho and one in Washington.

Geoscientist Neal Driscoll, director of the ALERTWildfire program at UCSD, said the system allows first responders to begin fighting fires at their outset.

“These cameras save critical time by allowing rapid confirmation of 911 calls and accurate location of new fires using the ALERTWildfire web-based interface, time that would otherwise be spent sending engines to mountaintops or launching aircraft to confirm fire ignition and location,” he said in a statement.

The network began in the Lake Tahoe region as a pilot project of the Nevada Seismological Laboratory at the University of Nevada, Reno. UCSD and the University of Oregon then became partners.

Funding has come from San Diego Gas & Electric, Pacific Gas & Electric, Southern California Edison and the California Department of Forestry and Fire Protection.