The pandemic this time makes it difficult to contact anyone for help when needed as for on-call basis. Home care companies can help, but they need at least a couple to few days' notice to get assistance. 24/7 caregiving is overwhelming at times. My husband mostly needs other males to talk to, but there are only females working for home health care places at this time.
Some suggestions:
1. Use a search engine to get hits for topics such as "Alzheimer's, emergency care", in your county, or adjacent counties or even your state. Think creatively and do subsearches for specific topics, like companionship, or those relating to out of control behavior.
2. Search medical sites for insurance providers: BCBSM has sent me a kit as well as contact information for emergencies. Research your insurance carriers to see if they offer similar contact information.
3. Law enforcement agencies would be open; they're probably overwhelmed on a holiday, but you could consider calling them Monday and ask what emergency resources are available. Same with your local city and county offices.
4. On Monday, contact the local Alzheimer's Assn.
I'm unclear though whether you mean emergency interaction, such as talking with other men, or medical emergency. Conversation vs. a medical issue is a big difference, and that would be reflected in the level of help available.
But, first, start with online research for your local Alz. Assn., Senior Center, city, county and state. The Area Agency on Aging used to be a good source, but in my area it's refocused its direction to its "same address" program. You can search their website though to see if they offer anything that could be helpful to you.
Is your husband a Veteran? If so, research the VA site; there are some good programs, including assistance for caregivers.