Zac Hall, 9to5Mac:

iPhone users are being notified about an excessive heat weather event through Apple’s Weather app on iPhone. While the weather event is happening in the Santa Clara Valley region of California, the alert says that the occurrence is happening in an area nearby regardless of where you live.

Hall had a good theory — that the warnings were being to delivered to people who live nowhere near Santa Clara Valley because Apple includes Cupertino as a default location for the Weather app — but in an update acknowledges that the warning notification is being received by users who don’t have any saved locations near the heat wave. (I’ve gotten the notification on multiple devices, and don’t have Cupertino saved as a Weather location.)

What a weird bug.