A gas furnace and gas water heater each have bright yellow glowing flex-lines, indicating the flex lines are perhaps 1200F...
https://mastodon.sdf.org/system/media_attachments/files/113/206/164/180/235/070/original/312fa1a5400ed341.png
You don't see this kind of spicy very often... Fortunately.
From Reddit r/electricians
According to comments, it's real, and the cause was a downed power line onto a gas main.
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