It could have been a bad patch or previously damaged and then some new stress, temperature, shaking, vibration, etc could have caused it to fall.

However, the best part about Atlanta is that there are hundreds of hyper-local markets, each with their own temperature.

Failure to keep the temperature 'comfortable' and failure to provide heat to a livable standard are not the same.

The pool heater should maintain the water at a certain temperature range, the A/C must be sized appropriately for the pool room and these conditions, a dehumidifier is an absolute and it must be sized accordingly.  

Finishing the basement will not increase the temperature of the home.

On other words, say I own a building that's used as a warehouse and someone drops a box on their head, or slips in the mud, are they coming after me?

The annual low temperature Raleigh average is 50.3 degrees.

Think of the crawlspace as a really short basement, you want it to be part of your house, not open to drastic exterior temperature changes. 

., since the weather has warmed up, the water heater has a smaller temperature rise to lift.

Eventually sold all the residential properties and bought a commercial 40k sqft warehouse which i rehabbed and sold for a big profit.