We have had a few 39s in Adelaide and nights too hot to sleep without fans. Just enjoying a brief cooler spell with about 10 minutes worth of rain !!
My out of fridge insulin is kept in a cool container with ice bricks to prevent it getting over 30 degrees C.
I pack an ice brick in my travelling insulin/pump consumables etc) kit when I go shopping - walking or by car.
For my insulin pump i have a travel wallet where the pump resides in hot weather for outdoors and a small ice brick fits in the wallet's smaller pocket. I end up drinking about 2 litres of water on a walking shopping trip.
About a 10% reduction in basal rate seems to balance out the reduction in BSL which I assume is due to the heat.
The Aussie campaign slogan for summer is: Slip (on protective clothing), Slop (on suncream), Slap (on a hat), Seek (shade, shelter) and Slide (on some sunglasses). My personal addition is Sip (lots of water).
It is nigh impossible to exercise, except early in the morning or in a covered pool or air-conditioned premises.
And I think the saying is incorrect: Mad Aussies like me, got out in the midday sun.
But the clothes washing dries real quick, the car starts easily (even if the steering wheel burns and the seat dries one's wet clothing)!! I leave a bowls and containers of water in the shade outside for thirsty lizards, birds, and the odd loose pet.
Note, the sea is not boiling (yet)!!
