I lived in Albuquerque for a while stationed in the Air Force. Then my wife got stationed there. So we went to the annual hot air balloon festival for 4 or 5 years.
There were accidents every once in a while and at least 2 fatalities I remember during that time. One crashed into the Sandias mountains immediately behind Albuquerque.
None of those accidents involved power lines.
I have taken one ride in a balloon and was on the chase crew for several other flights. I prefer the chase vehicles instead of being in the air. But that's just me. I know several people who used to fly their own balloons for years and never had any problems.
As an industry in the US, hot air ballooning is considered very safe. Fatalities are rare. But of the deaths recorded between 2000 and 2016 (21 total), these four deaths in the Albuquerque are a fifth of those total deaths.
I wonder if that includes (and it should) the 16 people that were killed in Lockhart Tx in 2016. That would be 21, including todays death toll (5 now).
Prayers to their loved ones and families. RIP.