Safety
Arizona heat and bathroom safety
By Aging Safely Baths · Updated · 8 min read
Summer changes how your bath water behaves and how your body reacts to it. A few simple habits help you bathe safely all year.
Direct answer: In Arizona summers, the cold water line can come out near 100°F, so baths and showers can run warmer than expected. Walk In Tubs Arizona suggests keeping the water heater near 120°F, knowing that anti-scald valves cannot make water cooler than the cold supply, drinking water and getting up slowly, and asking your doctor about heat and bathing.
Arizona summers change your bathroom
Most bathroom safety advice was written for places where summer means 85 degrees. Arizona is different. In Phoenix, Tucson, Yuma and Lake Havasu City, long stretches of summer run well over 100 degrees, and that heat reaches places you might not expect: the water lines, the bathroom itself and your body.
Here is a surprise for many people: in summer, the "cold" tap in Phoenix can come out near 100°F. Water mains and pipes run through hot ground, garages, attics and walls, and the water warms up along the way. 12News has reported on Valley residents turning on the cold tap in July and getting water that feels like a warm bath.
Source: 12News on hot water from the cold faucet in Phoenix.
That matters because a bath you mix the same way in July as in January can end up noticeably warmer. And a warm bath in a warm house, for someone who is a little dehydrated, can lead to a dizzy moment right when you are standing up on a wet surface.
This guide is not medical advice. It is a practical look at the risks and the habits that lower them. For anything about your own health, medicines or blood pressure, ask your doctor.
Why it matters
Falls in the bathroom are common and serious
1 in 4+
adults 65 and older fall each year, and fewer than half tell their doctor.
319,000
older adults are hospitalized for hip fractures each year.
81%
of nonfatal bathroom injuries were falls, and injury rates were highest in or around the tub or shower.
Sources: CDC older adult falls facts; CDC MMWR on bathroom injuries (2008 data).
Water temperature
The 120°F setting and what it does
Many safety groups and plumbers suggest setting a home water heater to about 120°F. That setting is hot enough for washing but lowers the risk of a scald from the hot side. Many Arizona homes are set higher, sometimes because a previous owner turned it up, or because a large household wanted more hot water.
To check yours, run the hot tap at the faucet closest to the water heater for a couple of minutes, then hold a kitchen thermometer in the stream. If it reads well above 120°F, ask a licensed plumber about lowering it, especially for gas or tankless heaters.
Lowering the water heater does not change the cold line. In summer, the cold side may already be close to body temperature, so your mixed bath can still end up warmer than you planned.
| Water source | Winter | Peak summer |
|---|---|---|
| Cold tap | Cool | Can be near 100°F |
| Hot tap at 120°F setting | Up to about 120°F | Up to about 120°F |
| What it means | More room to cool a bath | Little room to cool a bath |
Know the limits
What an anti-scald valve can and cannot do
An anti-scald valve, also called a pressure-balancing or thermostatic mixing valve, helps keep water at a steady temperature. If someone flushes a toilet or runs the dishwasher, it stops a sudden burst of hot water. Many walk-in tubs and accessible showers include one, and it is a feature worth having.
But a mixing valve can only blend the hot and cold water it is given. It cannot make water colder than the cold supply. On a July afternoon in Phoenix, if the cold line is close to 100°F, the coolest bath you can draw is close to 100°F. The valve protects you from water that is too hot, not from water that is too warm for a hot day.
In plain words: an anti-scald valve sets a ceiling, not a floor. In Arizona summers, the floor may be higher than you expect.
A few habits help:
- Test the water with your hand or a bath thermometer before you get in
- Run the cold tap for a minute first, which may flush the warmest water from the pipes
- Draw a shorter bath, or a shower with a seat, on the hottest days
- In a walk-in tub, a fast-drain system shortens the time you sit while water empties
Your body in the heat
Dehydration, dizziness and getting up slowly
Heat and warm water can both cause blood vessels to widen. When you add mild dehydration, which is easy in Arizona, some people notice lightheadedness when they stand. Certain medicines, including some for blood pressure, can add to that feeling. This is why the moment you stand up from a bath or a shower seat can be the riskiest part.
Ask your doctor whether your health or medicines change how hot or how long your baths should be, and how much water you should drink in summer. Then use simple habits that many people find helpful:
- Drink water before you bathe. A glass of water an hour or so before is a common habit. Ask your doctor how much is right for you.
- Keep the bathroom cooler. Run a fan or the air conditioning. A hot, steamy room adds to the effect of warm water.
- Keep baths shorter in summer. You can still enjoy a soak. Just watch the clock on hot days.
- Sit up first, then pause. Before you stand, sit upright for a moment and let your body adjust.
- Use a grab bar to stand. Never use a towel bar or the door. Grab bars are built to hold your weight.
- Tell someone. If you live alone, let someone know when you are bathing, or keep a phone or alert button within reach.
Print this
An Arizona bathroom safety checklist
Walk through your bathroom with this list. Many fixes are small and inexpensive. Others, like replacing a high tub wall, are bigger, and it helps to plan them before a fall rather than after one.
If you are weighing the cost of a bathroom change, our team's article on comparing the cost of a fall with the cost of a safe bathroom lays out both sides in plain numbers.
- Water heater checked and set near 120°F
- Bath thermometer kept by the tub
- Grab bars installed by the tub or shower and by the toilet
- Non-slip mat or slip-resistant floor in the tub or shower
- A seat for showering and for drying off
- Handheld showerhead you can reach while seated
- Night light on the path from the bedroom to the bathroom
- Fan or air conditioning working in the bathroom
- Phone or alert button within reach of the tub
- No step-over higher than you can manage on a tired day
For caregivers
Helping someone bathe on a hot day
If you help a parent or spouse bathe, a few extra steps in summer make the routine calmer for both of you.
Check the water first
Test the water with a thermometer or your inner wrist before they get in. People with less feeling in their hands or feet may not notice water that is too warm.
Cool the room
Turn on the fan or air conditioning a few minutes before bath time, and keep the door open a crack if privacy allows.
Offer water
A glass of water before and after the bath is an easy habit. Ask their doctor how much is right for them.
Plan the stand-up
Let them sit upright for a moment before standing, keep a hand ready, and use a grab bar. Have a towel and robe within reach so nobody rushes.
If they ever seem confused, faint or unwell during or after a bath, help them sit or lie down safely and call their doctor. Call 911 in an emergency.
When to change the bathroom
When a tub wall becomes the problem
Habits help, but sometimes the bathroom itself is the risk. If stepping over a regular tub wall already takes care, a hot day and a warm bath make it harder. A walk-in tub has a door and a chair-height seat so you never step over a high wall, plus a fast drain and an anti-scald valve on many models. A roll-in shower removes the step entirely and pairs well with a seat and a handheld sprayer, which can be a cooler option in summer.
If you are not sure which fits you, our two-minute Fit Check asks a few questions and suggests what usually works. You can also read about VA grants and ALTCS if cost is a concern.
The safest bath in July is one you tested with your hand, in a cool room, with a grab bar close by.
When you would like to talk it over, call Walk In Tubs Arizona at 1-888-779-2284. Quotes are free and written, and nobody will push you to decide.
FAQ
Questions Arizona families ask
Why is my cold water warm in July?
In Arizona summers, water mains and pipes run through very hot ground, attics and walls, so the cold line heats up before it reaches your tap. Running the cold tap for a minute may help a little, but in peak summer it may stay warm. Plan baths with that in mind.
Should I lower my water heater in summer?
Many households keep the water heater near 120°F all year, which is a common safety setting. Lowering it in summer will not cool the cold line, but it does lower the highest temperature at the faucet. Ask a licensed plumber before changing settings on gas or tankless units.
Is it safe to take a hot bath in summer?
That depends on your health, your medicines and how hot the room and water are. Warm water widens blood vessels, and in a hot house that can add up. Ask your doctor what water temperature and bath length are right for you.
What is the safest time of day to bathe in summer?
Many people find early morning or late evening easier, when the house and the water are a little cooler. Pick a time when someone else is home if you have had dizzy spells. Your doctor can tell you if timing matters with your medicines.
Bathe safely again, without leaving home.
Get a free, no-pressure Arizona quote for a walk-in tub or roll-in shower, installed or supply-only.