Temperature increased by 4 degrees in our esams racks (at least OE10/11/12/13), which triggered a Juniper "Temperature Warm" alarm.
That started at around 14:30UTC.
Eg. https://librenms.wikimedia.org/graphs/type=device_temperature/device=145/to=1498148100/from=1498126500/
EvoSwitch support contacted.