Select career mode,
then select single city run san francisco on hard difficulty,

Create a new fire squad, attach one firefighter. Distribute any excess personnel among the squads. Use the money you have left to buy armor for the police and first aid kits for medics

Once you started deployment, put emergency vehicles in the shape like in the photo. It will help you get to emergencies faster.
Try to resolve emergency calls as quickly as possible no way
also try to keep your units in their original position when they finish an emergency.
If your emergency calls are too complicated you can reset the save.

As soon as the call appears, press ignore button.if it works, write in comments