Houston's heat season runs longer than summer on the calendar. Here's how to keep a parent aging in place safe, from cooling the home to knowing when heat exhaustion has become a 911 emergency.
Quick answer: Older adults regulate heat less efficiently than younger people, and common medications — diuretics, sedatives, tranquilizers, and many heart and blood pressure drugs — can make it worse, so don't wait for a heat advisory to act. Keep the home cooled or know your backup (a window or portable AC unit now satisfies Houston's new rental air-conditioning ordinance even without central air), call 3-1-1 to find the nearest cooling center and a free ride there if needed, and learn the difference between heat exhaustion (cool, moist skin, heavy sweating) and heat stroke (hot, dry skin, confusion, no sweating) — heat stroke is a 911 emergency. Check in on a parent who lives alone at least once a day during a heat advisory.
Houston's heat season doesn't end when the calendar says summer is over. Triple-digit heat indexes routinely stretch into September and even October, and for an older adult aging in place — in a house, an apartment, or a townhome without a caregiver watching the thermostat — that's a longer stretch of real risk than most families plan for. The good news is that almost every serious heat-related emergency in an older adult is preventable with a handful of habits and a couple of phone numbers saved in advance.
Why heat hits older bodies differently
Aging changes how the body handles heat. The CDC notes that older adults have a reduced ability to regulate body temperature as a normal part of aging, and existing conditions like heart disease can make the strain of high heat worse. Heat.gov adds that some older adults are less likely to sense or respond to changes in temperature the way they did when younger, and that cognitive conditions like dementia can make it harder to recognize the danger or take protective action — like turning on a fan or moving to a cooler room — without a reminder.
Social isolation compounds the risk. An older adult who lives alone, rarely leaves the house, or is reluctant to run the air conditioner because of the electric bill can go a full day showing warning signs with no one else there to notice.
Medications worth a call to the doctor or pharmacist
Several common prescriptions change how the body handles heat, and the National Institute on Aging specifically flags diuretics, sedatives, tranquilizers, and some heart and high blood pressure medicines as drugs that can increase vulnerability to overheating — and the risk climbs when someone takes several of these at once, which is common for older adults managing multiple conditions. Heat.gov adds that some medications interfere with the body's ability to manage its own temperature or blunt the nerve signals that trigger sweating.
This isn't a reason to stop any medication on your own. It's a reason to ask your parent's doctor or pharmacist, before hot weather sets in, whether any of their current prescriptions call for extra caution — more frequent hydration checks, a lower activity threshold outdoors, or closer monitoring during a heat advisory.
Cooling the home itself
Houston's new rules for rental housing
If your parent rents, a change is coming that's worth knowing about. In August 2026, Houston City Council passed an ordinance, by a 12-2 vote, requiring working air conditioning in all rental housing citywide — both single-family rentals and apartments. The ordinance doesn't set one specific indoor temperature landlords must hit; instead, it closes a longstanding loophole that had allowed some landlords to treat 89 degrees as an acceptable indoor temperature on the hottest days. Landlords aren't required to install central air to comply — a window unit or portable air conditioner in each habitable room satisfies the new requirement. The rule takes effect roughly 120 days after passage, putting enforcement around mid-December 2026, so it won't help this heat season, but it's worth knowing about for next summer and worth mentioning if your parent's landlord is dragging their feet on a repair.
If the AC breaks and the landlord won't fix it
Texas doesn't have a blanket state law guaranteeing tenants air conditioning, but if a unit already has AC and it stops working, Texas Property Code Section 92.052 requires landlords to repair conditions that materially affect a tenant's physical health or safety — broken cooling in Houston summer heat generally qualifies. To use this protection, your parent (or you, acting on their behalf) generally needs to be current on rent, give the landlord written notice under Section 92.056, and follow the specific procedure in the law. There's also a repair-and-deduct remedy under Section 92.0561 that lets a tenant pay for the repair and deduct it from rent, but it has strict requirements — including formal notice to the landlord and, in most cases, notifying a local housing or health official in writing — and using it incorrectly can create its own problems, including possible eviction exposure. Before pursuing repair-and-deduct, it's worth a call to a local tenant's rights organization or legal aid office to make sure every step is followed correctly.
When home cooling isn't enough: cooling centers
The City of Houston activates its formal heat emergency plan when the heat index reaches 108 degrees on two consecutive days. During an activation, designated cooling centers — including public libraries, Parks and Recreation community centers, and the city's multi-service centers — stay open later, typically from 3 to 7 p.m., specifically so residents without reliable air conditioning have somewhere to go. You don't need a heat emergency declared to use a library or multi-service center as a cool place to spend an afternoon, either — they're open on their regular schedules the rest of the time too.
To find the nearest cooling center or air-conditioned public building, call 3-1-1. If your parent doesn't have reliable transportation, 3-1-1 can also arrange a free ride from METRO or zTrip to and from a cooling center. Harris County maintains additional cooling locations outside city limits, listed at readyharris.org. If accessibility accommodations are needed, the Metropolitan Multi-Service Center at 1475 W. Gray Street is set up for that, though every city cooling site welcomes all residents.
Sign up for advance warning before the heat arrives
Two free programs are worth setting up ahead of time, and it's important to understand what each one actually promises:
- Houston Health Department's Heat-Health Alert program sends advance notifications when dangerously high heat is forecast, giving families a day or more of lead time instead of finding out from the evening news. Sign up through the Heat Health Houston interest form on the Houston Health Department's website.
- CenterPoint Energy's Critical Care / Chronic Condition customer status flags an account for a resident who depends on electric-powered, life-sustaining medical equipment. Read the fine print, though: this status is a communication tool, not a guarantee. It generally means CenterPoint will try to notify the household about estimated restoration times during an outage — it does not promise uninterrupted power or faster restoration. Apply through CenterPoint's Critical Care customer form on its website.
Heat exhaustion vs. heat stroke: know the difference before you need it
The Houston Fire Department publishes clear guidance on the two conditions, and the distinction matters because the response is different:
- Heat exhaustion looks like profuse sweating, pale or cool, moist skin, muscle cramps, weakness, dizziness, headache, nausea or vomiting, and a weak but rapid pulse. Move the person to a cool location, offer water or a sports drink, and have them rest — they should avoid strenuous activity for several hours afterward.
- Heat stroke is a medical emergency: body temperature above 103°F, red, hot, and dry skin with no sweating, a rapid and strong pulse, throbbing headache, dizziness, nausea, confusion, or unconsciousness. Heat stroke can cause death or permanent disability without emergency treatment, so call 911 immediately rather than trying to manage it at home.
If you're ever unsure which one you're looking at in a parent or older neighbor, treat it as the more serious possibility and call 911. It's far better to have paramedics rule out heat stroke than to guess wrong.
Build a daily check-in habit, not just a heat-advisory one
Public health guidance is consistent on this point: caregivers and family members should check on older adults who live alone at least once a day during hot stretches, and more often — ideally twice a day — for anyone who is frail, has a chronic health condition, or depends on medical equipment. A short daily phone call or text is often enough, but during an actual heat advisory, an in-person visit lets you confirm the air conditioning is actually running, notice whether your parent is drinking enough water, and catch early warning signs before they become an emergency. The same habit is worth extending to an elderly neighbor who lives alone, especially if you already know they don't have reliable transportation or air conditioning.
None of this requires a dramatic overhaul — it's a phone number saved in your contacts, a conversation with a pharmacist, and a daily check-in during hot stretches. If you'd like help thinking through your parent's heat-season plan alongside their broader care needs — whether that means arranging in-home care for daily wellness checks, exploring adult day programs that get a homebound parent into an air-conditioned, supervised setting during the day, or simply having a local advisor look at the whole picture — call Houston Senior Advisor at (346) 385-3815. There's no cost to talk it through.
Last updated September 1, 2026. This guide is general information for Greater Houston families, not medical, legal, or financial advice.
