The blaze threatened the observatory and communications infrastructure at the peak. Later, an observatory official said it appeared to be under control.

The Eaton Fire burning through the hillsides and mountains above Pasadena is now approaching the Mount Wilson Observatory, with potential implications for both the historic structures and emergency communications during the ongoing wildfire siege devastating Los Angeles.

While fire officials said Thursday morning that growth of the 13,690-acre Eaton Fire has been significantly stopped, it continues moving north, reaching the peak of Mount Wilson where a Southern California transmission center is housed.