PHOENIX - June 26, 1990. It's a date long-time Phoenix residents should remember.

The thermometer hit 122 degrees that day, marking the hottest temp ever recorded in the Valley of the Sun.

RELATED: Hottest day ever: 122° — and other 'cool' Phoenix-is-really-hot facts

Come Tuesday and Wednesday, Phoenix residents should be prepared for what could be some of the hottest days ever.

It's officially reached that don't-go-outside-unless-you-have to type of weather and with all heat-related memes and jokes aside, it's a huge health risk.

Your body at 100+ degrees

When the thermostat begins to show numbers beyond 100 degrees, the environment affects our bodies in a certain way.

Normally, people stay cool by shedding unused energy. The heat flows from the body to the surface of the skin, then out into the air.

But, when Valley temperatures get really hot, the reverse effect happens, with heat going into the body.

READ: This is what happens to your body at 100-degree heat

Drink, drink, drink and drink some more water

It's a must overall and especially needed in this record-breaking heat. But how much should you be drinking?

Well, that depends on body weight and you're going to have to do some math.

READ: How much water your body actually needs

A medical emergency

Recognizing signs of an individual suffering from a heat-related medical emergency is the first step in what could be a life-saving progression of events.

READ: What to do in a heat-related medical emergency

Seeing the signs

Did you know? For babies and young children, refusing to drink when offered is a sign of possible heat stroke.

Annually, 600-700 people die from heat-related illness and those high temperatures are especially dangerous for an older or younger individual.

In those age groups which may not be able to verbalize their condition -- it's up to others to spot the signs of heat stroke or heat exhaustion.

READ: Phoenix is about to get very hot. What are the signs of heat stroke?

What about your car?

Along with the usual car trouble calls, the rising temperatures will bring in waves of stranded drivers with cars that are not well equipped to handle the heat.

Luckily, there are some easy preventative measures you can take to protect your car in the summer months.

First and foremost, check the back seat and do your part in preventing hot car deaths.

READ: Is your car ready to handle Arizona's summer? Here are some tips.

And always remember to look over your summer heat safety checklist.