Have you tried a "face down sleeping mask" or a specialty pillow? Ever tried lying down on a massage table with the hole in it for the face? Very restful and no stale air problem like in regular bed. The problem with such is adequate air flow under the face. I turn on a fan in my room and just use one arm or the other to keep my face off the mattress and together that allows enough air flow so I'm not rebreathing too much. Arm goes numb but I keep switching them during the night. Also could lift the head of the bed so there's a gentle downward slope toward the foot, about 4-8 inches depending on what works for you. Takes some pressure off the upper body, redirects it, allows some to sleep better, especially those who get that "drowning" or breathless feeling due to fluid buildup in body. Might help apnea too. Many older people prefer to sleep in an recliner chair instead of a bed for much the same reasons. My father and a grandparent both slept in a recliner after the age of about 60-65. Interesting discussion here.
blackouts from excessive power usage due to the heat.
It will probably be here by the weekend which means more hot weather. I have re-configured all of my electrical usage to minimize the drain on the circuit which feeds my Air Conditioner, and my CPAP machine. I woke up one day last week, to find that the breaker had popped, and that I'd pulled off my mask in my sleep. Because of the sleep apnea I slept about 12 hours, and woke up feeling dreadful, only to find that the breaker (actually a resettable fuse) had fried. Bought 3 new ones this weekend, and my what a difference they made. Then again it's been cool. Next weekend and the following week will be the test.
Good luck everyone south of the Border. I hope this is confined to Canada to give you guys a break.