Presumably these will start to become more common resulting in "standing exemptions" to public safety entities so that they may operate without waiting for an FAA event/incident specific clearance during emergencies.
Most public safety agencies/entities train to a level of competence defined in a standard developed by the National Fire Protection Association (NFPA) whose title is "NFPA 2400: Standard for Small Unmanned Aircraft Systems". This document was created by stakeholders from all areas of public safety (including police), and includes competencies and skills defined for pre-flight, mission planning, flight, maintenance, training, operator/observer certification, etc.
It goes well beyond FAA 107 and related regs to better define specific skill sets (and ways to measure competency) for the tactical use and deployment of these assets, so that this specific user group has a higher bar to follow, and these resources can be used safely and to best advantage.
The standard can be read online by anyone on the NFPA web site if you have an interest (NFPA.org or search NFPA2400) and anyone can submit comments as the standard is revised on a regular basis (typically every three years).