For communities like Simi Valley, where dry hillsides and Santa Ana winds can turn a small ignition into a fast-moving wildfire, earlier detection can make a significant difference.

A new satellite system called FireSat is being built specifically to detect and monitor wildfires from space. On July 7, three operational FireSat satellites launched from Vandenberg Space Force Base aboard SpaceX’s Transporter-17 mission. They are now undergoing several months of testing and calibration, with operational data expected to begin reaching participating fire agencies and researchers later in 2026.

FireSat is led by the nonprofit Earth Fire Alliance, with satellites designed and built by California-based Muon Space. Google Research contributed to the system’s development, including artificial intelligence that helps analyze infrared satellite imagery.

CAL FIRE also played an early role in testing and evaluating the concept.

The satellites use multispectral infrared sensors to locate heat from new and growing fires and can provide information about hotspots, fire boundaries, movement and intensity.

The three new satellites are just the beginning. FireSat’s current roadmap calls for more than 20 satellites during the 2027–2029 buildout, eventually growing to roughly 50 satellites. When fully deployed, the system is intended to detect fires as small as about 5 by 5 meters and revisit locations worldwide approximately every 20 minutes or less.

FireSat will not replace California’s existing wildfire detection systems. Instead, it adds another layer to a growing network that already includes ALERTCalifornia’s 1,200-plus monitoring cameras, AI-assisted fire detection, aircraft, drones, satellite imagery and real-time fire mapping systems.

For Simi Valley residents, the real value is not a new app or consumer alert. It is the possibility that firefighters could receive better information sooner, giving crews another tool to find and respond to emerging fires before they have time to grow.