When multiple semiconductor devices are arranged on the same board, is it necessary to consider thermal interference?

In the case that multiple semiconductor devices are arranged as heating sources on the same board, mutual thermal interference occurs due to distance etc.
In particular, in the case of proximity arrangement of semiconductor devices that reach high temperature, the temperature becomes higher than when such devices are used alone, as a result of the synergistic effect.
In the case below, even though the power loss of each device is the same, the temperature of a device located at or near the center will be higher.