Clarkson said Australia is "God's laboratory".
"A place far, far away where he could house all his experiments that had gone wrong," he wrote.
"For millions of years, this big, sandy cupboard under the stairs went unnoticed. But then along came Captain Cook and now the world knows all about Oz and its stupid, dangerous creatures," he continued.
READ MORE:
• Three fires merge: Blazes combine to create 6000-hectare inferno in Australia
• Australian bush fire crisis: Conditions 'may not be survivable'
• Australian bushfires: 'This isn't a bushfire, it's an atomic bomb'
• Australian bushfires: Horror day as fires ravage NSW and South Australia
"Plainly, God is embarrassed. Because he's decided to set fire to it.
"It's been argued the fires raging across the country were caused by global warming or out-of-control barbies. But when you look at the footage, you know something biblical is going on.
"Thousands of homes have been obliterated. And people are dying. This has happened before in recent years and there's no doubt it will happen again. Which means people must accept that Australia isn't meant for human habitation," he added.
People took to social media to slam Clarkson's attempt at humour in the face of such tragedy.
