Hot Weather for Old Folks

How are you dealing with this exceptionally hot weather?
I haven't been handling it well. I've been taking very short walks and spending most of the time sitting around at home.
Walking on hot pavement is dangerous for old people, and also very dangerous for dogs, who are closer to the radiant heat.
A few weeks of this and I'm noticing a loss of muscle strength, and so is my neighbor Fred. It happens faster when you're older.
By 8:30 the temperature is rising.
I will change my day pattern so that we get outside by 7:30 or sooner and can complete a long walk before it's too late.