Uncertain about your report of 'won't start'.
Does it crank but not start, not engage the starter, turns over weakly or strongly, blows what color exhaust smoke, with or without compression release...need more details.
It's still plenty hot in Houston and a hot battery might be a problem. Depending what the engine is powering and where the battery is, the battery could be getting hot while running then proving weak when trying to restart.
Batts are funny (I spend a lot of time laughing maniacally). This summer on hottest day had one die, then another on the morning of the first cool snap.
Curious how this resolves. Please post back your continuing experiences so we may all learn.