Toast at the top of page

Any pointers or steps to how we can create a toast on top of the main nav bar? This is for a temporary COVID-19 update that we want to appear at the top of the page in a 100% wide but thin banner at the top

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Thank you @TheCat. I am going to try what you suggested - heading OR Notification.

Do you think it is also possible to add a close “x” or “dismiss” button to that toast, and have that disappear when clicked?

Sure, all sorts of formatting can be accomplish however you want.
Put it in the background and let the main page scroll over it, parallax like. Or fade out on scroll.