Usually when the expression “cabin fever” is used it’s referring to winter time for folks who live up north. The snow piled high and the cold temperatures have made it so they can’t go outside. However, now they are finding our summer time heatwaves are starting to have a similar effect on us.
The recommendations are that we make a conscious effort to wake early or stay up and out later to walk bit outside when the temps are at their most bearable. Exercise is also key. Working off pent-up energy at the gym with AC will help.