Excerpts from deadline.com:

Fox is pushing deeper into unscripted programming after the breakout of The Masked Singer, re-teaming with producer Dick Wolf on First Responders Live.
Hosted by Josh Elliott and co-produced by Red Arrow Studios’ 44 Blue Productions, the show will premiere June 12. It promises an unprecedented look at fearless first responders as they answer emergency calls across the country.
The territory explored by the new show is already marked in the scripted realm by Wolf’s Chicago-set dramas centered around police and fire units, but the new series takes the concept into real life. In basic cable, A&E’s Live PD has gotten significant traction with a similar approach, delivering the network its highest ratings of any of its current shows and some enviable stats in on-demand viewing as well.

thanks Ron