Keep water in your car and rotate it frequently, try for a couple of gallons.
Pet items, treats, food, meds.
A whistle, in case you can’t be seen
Jumper cables as well as tire repair kits and an inflater and battery back up if possible.
Emergency signals, flares, a yellow vest and signs to add to your kit so that people can see you in the dark or to signal for help. This kit has most of the things already in it, or get what you want separately
A flashlight and batteries or charger
Basic first aid kit If you are a health care provider you may have more advanced tools.