Issue with image responsiveness on mobile devices

Hi there

I’m having an issue with the images on the home page resizing properly on mobile devices.

Checking the responsiveness in a web browser on my laptop, and all is well.

On my iPhone and iPad, the two images are super large and so just look like dark blurs.

I’ve used Ally on several websites and never had this issue. Not sure what I’ve done wrong this time.

Can anyone help?

Website is http://www.merkabahenergy.com.au/