GAY marriage has been linked to disasters including bushfires in an email sent to NSW state politicians.

The message from religious newsletter service Christian Snippets Australia warned the recent "bushfires and gale force winds" were a "prelude" to what will happen if Parliament passes a gay marriage bill introduced in the Upper House today.

The email was "a final attempt to avoid the foreboding disasters that God will bring down upon your own head, and upon the heads of many others, should this Bill be passed".

The message addressed to state Premier Barry O'Farrell continued: "QUASH THE BILL OR BE QUASHED."

This is not the first instance of a group trying to link gay marriage with wider trends in recent times. After the ACT legalised same sex marriage last week, Christian advocacy group Family Voice Australia warned - in what they called a "lighthearted" press release - that gay marriage might confuse Canberra's tradies.

Bob Starkey from Christian Snippets Australia said disasters had been linked to "wickedness" in the past.

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