The shorts and sundresses were out in force in Walnut Creek Thursday, as the temperatures once again topped 90. Others preferred to stay cool by staying inside.
Seniors can be at risk when the weather heats up, even in their own homes if they don't have air conditioning.
"I have a horrible time in the heat," said Pleasant Hill resident Lyn Hansen. "I just wilt."
Another woman told us she actually likes the heat, having moved to California from relatively cool and soggy Washington state.
Animals can also be severely impacted by the heat. The folks at the Tony La Russa Animal Rescue Foundation say it's up to owners to look out for signs that their pets are overheating.
"You've got to be careful to watch the signs for your dog," said Ellen Bicker. "Are they panting, which is not as equivalent to our sweating. Our sweating is a more cooling system than panting. You have to make sure there's lots of water available. And put your hand to the pavement to make sure the pavement's not too hot."
Cats can be affected, too. Though they have their own way of hiding out whether it's hot or cold.
And all animals can be seriously hurt, even killed, if left alone in a car even one in the shade.