It is a common practice to keep breads and dry cakes on your dining table or kitchen shelf, however, Indian summer is surely not the right weather for this. The hot and humid temperature gives the apt environment for the moulds and microbes to grow. Although your loaf looks moldy only after a few days, the deterioration starts in just about one day if left in hot environment.
Bread is a perishable food item, and must be refrigerated especially when the temperature is soaring. Refrigeration helps curb the development of molds on the bread and you can eat it fresh for a few days.
The same logic goes for dry cakes, muffins, and brownies. You must store them in the refrigerator to consume them in a healthy state.
Consuming perished bread can cause digestion issues, diarrhea, allergy and respiratory issues too. As per USDA, you must reject moldy breads right away rather than removing the affected part or pieces and consuming the rest of it.
The mold spores have deep roots and the microbial growth may not be visible to naked eyes. The over fermented bread is simply not good for your tummy. Either Refrigerate or be prepared to reject.