Black Dogs definately cannot endure hot humid weather like a yellow lab or a blonde golden.....I know this! I would definately keep her out of the heat...she could go into heat stroke.....Her disorientation....sounds like it's heat related......Keep her in and walk her only in the morning when it is cooler or in the late evenings when it's not so bad....if it's humid at nite too....just take her out only when necessary....that's what i would do...I have a black border collie...and he just dies in heat like that...He's back up on the porch like "let me in" - whereas the golden can lay in the shade in the yard and be okay for a little while longer.....But they sure do like their popsicle bowls...(Little metal bowls with ice cubes in them)...Blaze literally sticks his snoot in his bowl and just breathes the cool air coming from the ice....He'll stand under the ice maker in the kitchen until you notice what he wants....or wait for one to fall.....I would play it safe with the heat index...we're in a suburb of chicago...and have the same kind of heat bouts that you guys do.....You gotta be careful with pets and nasty heat....and NEVER leave your dog unattended in the yard or in your car in this heat....even 5 minutes could harm them....Just keep an eye on her in the really hot days....but it wouldn't hurt to take a trip to the vet....and tell him/her what happens.....Just to be sure....