Last summer we had an unusual situation, a significant amount of smoke from wildfires in British Columbia came down into the area and there was no wind to blow it off. The silence during the smoky hot spell felt eerie.
The reflections are an indication of the very low winds. In the evenings in summer the water is often fairly choppy instead of the light ripple. In the morning it is usually calmer but not the mirror like stillness. The sunsets are often lovely but at that time the sun just faded out through the thick atmosphere.