Relevant bits, without corny jokes, from the original Ashcroft Fire Rescue post on Facebook:

A quick investigation revealed the cause of this fire. It was determined to be a fish. The fish had an incredible journey, considering the river is 3km east from the point of origin. The fish had been dropped by a local osprey onto the hydro line causing embers to drop, along with the fish, to the dry grasses below. We do suspect by the size of the fish and the heat of the day probably caused the rather tired bird to drop its catch. It has been verified that our prime suspect sustained no injuries in the incident.

INTRODUCING THE ALL-NEW SOLID ORAL™ SPORTS HYDRATION SOLUTION DRINK THING!

Things I’d want to know before deciding for myself whether the screenshot montage is real, regardless of whether Trump shared it (he did):

• Have we seen other screenshots where Trump use enormous font sizes? Is that how bigger system text looks in this app? He’s not exactly youthful, so it’s no great surprise, but worth asking the question.
• Is it realistic that Trump or an aide would have screenshotted the entire message within two minutes of it being received?
• Does this messaging app routinely display the contact name offset and the profile image vertically cropped? What app is it?

Exactly this - here’s Bill Hader telling the story in 2014.