They were found scattered around the neighbor's yard in triple digit heat screaming for their lives. Good thing their dog couldn't get to them. Mom was dead from heat and probably having litter after litter. All four have fever coats because mom was stressed during pregnancy. Hopefully they didn't miss any others.
These are the same neighbors we socialized two feral kittens from and found a home for a couple months ago. One of those moms could have been this mom. The other one, now gone because who knows why, we remember because she looks like our calico. Her kittens would regularly be hit by cars and she'd spend hours calling to them. Who knows how many were killed by the dogs around here.
The world won't run out of kittens if you spay or neuter your cats.