I've had to change my tactics and my training goals. With overnight lows staying well into the eighties, I've got a short window of time in which to train, usually between when it gets light enough to see and sunrise. Instead of multiple long marks, I'll do one, or maybe a double, and shorten it up. I always have water, a cooler of ice and a 12-volt fan in the truck. I keep the sessions quick and I give the dog plenty of rest between even short runs. And I don't ever, ever, swim my dog in a body of water under an algae bloom warning. Instead, I've taken to sneaking into my local city park pond (which has several fountains and aerators that help prevent algae blooms) early in the morning before anyone's around for water work. It's not an ideal situation, but until we get significant rain, it's what I'm forced to work with.