Extreme heat and exercise

Forgive me, Father, for I have sinned; it has been two days since my last blog post.
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Having gone on an hour walk this evening, I was interested to find this piece on the warnings of heat cramps/exhaustion/collapse. (Yes, I'm feeling fine.)
In the extreme weather we're having, with advisory warnings every day, you have to be cautious. For instance, I take two water bottles for one hour instead of the usual one.
I've not been out on the newbie bike lately, either, and it's killing me. I miss it. Love Spin class and other things from the gym, but I'll be grateful for cooler weather.