Fact or fiction about the Arizona heat

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By Andrew Michalscheck By Andrew Michalscheck

PHOENIX -- With the heat now at record levels, it's time to separate fact from fiction.

Viewers have been sending me emails wanting to know if some of the things they've heard about the heat are true.

Heat Tip #1
Can the water in a plastic bottle be spoiled if it's left in a hot car for a couple of days?
It all depends on the small number etched into the bottom of the bottle, says Moe Fernandez,  who along with his wife and daughters owns the Arizona Bottling Company.
Fernandez says if your bottle has numbers one through six on the bottom, the heat won't hurt what's inside but it's the number seven you have to be concerned with.
That's because a number 7 stamped into the plastic means it contains BPA, a chemical that some believe can cause cancer.  Fernandez says even though the FDA disagrees, some studies show high temperatures can cause that type of plastic to break down and leak BPA into the liquid or food that's inside. 
Fernandez says he would play it safe and not allow his family to keep any type of plastic bottle in the car during such high heat.
Heat Tip #2
Do high temperatures change the potency of medications?
"Yes, it can," says pharmacist Steve Genrich of Camelback Village Pharmacy. 
Genrich says most medicines should be stored at room temperature which is between 59 and 81, degrees unless otherwise noted.
He says tablets do better in extreme heat than capsules, creams and lozenges, which can quickly lose their form and potency.  He says if you have mail order medicines shipped to your home, remove them as quickly as possible from the oven hot mailbox.
Heat Tip #3
Will watering your lawn and plants in the middle of a hot day kill them?
Probably not, say the folks at Berridge Nursery in Phoenix, but it's a waste of time, water and money since the water usually evaporates before it can even reach the roots.