Last night my wife, sister-in-law, and I went out to dinner. We couldn't go to our favorite restaurant because they were closed "due to lack of employees". Another favorite restaurant across the street was also closed, and we saw numerous taco shops also closed.
Driving though nearby Vista just past 5:00pm, several cars were driving around, honking horns and waving Mexican flags. No American flags could be seen, just flags of Mexico. A few other drivers would honk in apparent support.
Otherwise not much impact that I could see here in north San Diego county.
Uno de Mayo