I am also in Florida(central, between Daytona Beach and Orlando) and it's hot enough to make anybody sick if they stay out long enough. It could get dangerous if she gets way too hot. I would think she would get sick right away though and not necessarily on the next day. I've heard of cases where the dogs go into hyperthermia and have to hosed down, etc. It might be the lizard making her sick too. Especially if it's one of those blue ones. You might want to call the vet if this continues. Best of luck to you.

Sandie: the humidity isn't that bad yet but the sun and heat will scorch you. Every year it gets hotter and hotter here it seems.