The heat index in New Orleans topped 110°F during the warning period reported by WWLTV.com this week. That is not a record — South Louisiana has seen worse — but it is the kind of number that kills people who are not paying attention, and it arrives every summer now with less recovery time between spikes.

Extreme Heat Warnings from the National Weather Service mean the combination of temperature and humidity is dangerous to healthy adults doing ordinary outdoor activity. For households with elderly residents, young children, anyone on diuretics or beta-blockers, or anyone in a home without functioning central air, the threshold for danger is considerably lower.

What is actually different about this heat event

Louisiana's humidity is the variable that turns a hot day into a physiological emergency. A 98°F day in Phoenix allows sweat to evaporate and cool you. A 98°F day in New Orleans — with a dew point near 80°F — does not. Your body's cooling system runs at reduced efficiency, and core temperature climbs faster than most people expect.

The second variable is grid load. Entergy New Orleans operates one of the country's older urban distribution systems. When demand peaks during a multi-day heat event, the probability of localized outages rises. A power cut during extreme heat is not an inconvenience — for a household without a backup plan, it becomes a medical emergency within a few hours for vulnerable members.

The third variable is housing stock. Much of metro New Orleans sits in older homes with minimal insulation, low ceiling heights in some neighborhoods, and window units that have not been serviced in years. Those homes heat up fast once the AC stops.

What we would actually do

Check your AC unit today, not when it fails. Replace the filter if you have not done so in the past 30 days. A clogged filter forces the unit to work harder, reduces cooling capacity by a meaningful margin, and is the most common reason units fail during peak load. A new filter costs under $15 at any hardware store.

During a warning period, your AC is a life-safety system, not a comfort appliance. If it is struggling to hold temperature — running constantly without reaching your set point — call an HVAC technician before the system quits entirely. Wait times during a heat emergency in Louisiana can stretch past 48 hours.

Identify your nearest cooling center before you need it. The City of New Orleans and Jefferson Parish both activate cooling centers during Extreme Heat Warnings. Locations change year to year. Bookmark the relevant parish emergency management page now, while you have power and time. If you have a neighbor who lives alone — particularly an older adult — check on them by midday on warning days. Heat mortality is heavily concentrated in people who live alone and are not found until it is too late.

Freeze water in advance, not during the warning. Fill two-liter bottles two-thirds full and put them in your freezer now. If you lose power, they extend the life of refrigerated food and give you a cooling resource. Wet towels placed on the neck and wrists work faster than most people expect because those are locations with surface blood vessels. This is basic biology, and it costs nothing.

Know your household's medication risk. Common prescriptions — including blood pressure medications, antihistamines, and antidepressants — impair heat tolerance by interfering with sweating or blood vessel dilation. If anyone in your home takes a daily medication, a two-minute conversation with a pharmacist about heat risk this week is not an overreaction. It is exactly the kind of low-effort action that prevents an ER visit.

Plan for 72 hours without grid power. This does not mean buying a generator tomorrow. It means knowing where you would go, having enough water (one gallon per person per day is the standard reference), and having a charged power bank for phones. A hotel reservation made early in a warning event costs less than one made after widespread outages strand everyone simultaneously.

The bigger picture

Louisiana's heat season is not a disaster waiting to happen. It is a recurring, manageable condition that kills people who treat it as background noise. The goal here is not a bunker and a year of freeze-dried food. It is a household that handles a five-day Extreme Heat Warning without a trip to the emergency room.

That requires knowing your vulnerabilities, knowing your resources, and taking three or four inexpensive steps before the warning, not during it. WWLTV.com will keep covering the warnings. Your job is to have already done the boring work by the time the alert hits your phone.