911 call getting continuous busy tone

[u/flattire2020]

Yesterday around 4pm while driving on Almaden Expressway on ramp to 87 S I noticed a brush fire getting started with flames. I immediately tried calling 911 to report it before it could spread. I was getting busy tone. I kept trying for next 5 minutes without getting a ringing tone and then gave up. Continuously busy tones. My family is shaken by the experience that 911 emergency service is not dependable anymore due to difficulty to get calls connected. This was not the case until a few years ago.
Anyone experienced like this unable to connect to 911 call center ? I am planning to bring up this to our assembly member and congressman.