Bourke Parrot - Abandoned eggs

I now fairly certain that the Bourke female has abandoned her eggs, last week after a thunderstorm she was out of the box and I have not seen her back in it to date. My father has always told me that thunder can kill eggs, there is a definite coincidence here but I'm not 100% on how true it is.

My Indian Ringnecked chicks are feathering well and seem very healthy.