Las Vegas Just Hit 94 Degrees in March. Here Is How to Get Your Home Ready.

Service Your AC Before It Fails Under Load

Your air conditioner is about to work harder than it has since last August, and it has been sitting dormant. That means refrigerant levels may have shifted, the capacitor may be going soft, and dust has settled on the evaporator coil. I have seen units that ran fine in October lock up within 48 hours of a heat spike like this because nobody checked them in the off-season.

Call an HVAC technician today. Not tomorrow, not this weekend. Every HVAC company in the valley is about to be slammed with calls from people whose units already failed. Getting ahead of the rush is the difference between a $150 tune-up and a $5,000 emergency replacement with a two-day wait.

• •Replace your air filter right now. If you cannot remember the last time you changed it, it is overdue. A clogged filter forces your system to work harder, drives up your electric bill, and can freeze the evaporator coil.
• •The condensate drain line is the one most people forget. Pour a cup of white vinegar down the drain port on your indoor unit. If it drains slowly or backs up, you have a clog forming. A blocked condensate line is one of the top causes of water damage in Las Vegas homes during heat season.
• •Clear debris from around your outdoor condenser unit. There should be at least two feet of clearance on all sides. Pull away any landscaping rocks, trash, or patio furniture that is blocking airflow.
• •Listen for unusual sounds when the unit kicks on. Grinding, squealing, or clicking noises mean something mechanical is failing. Catching it now saves you from a full breakdown on a 99-degree day.
• •Walk through the house and make sure all your vents are open and unblocked. Furniture, rugs, and curtains covering vents force your system to push harder and create uneven cooling that strains the compressor.

Seal Your Home Against the Heat

Desert heat does not just beat down on your roof. It sneaks through every gap, crack, and poorly sealed joint in your building envelope. In a typical Las Vegas home, air leaks can account for 25 to 40 percent of your cooling costs. When outside temps push toward triple digits, those leaks are not just wasting money. They are forcing your AC to run continuously, which shortens its lifespan and increases the chance of a breakdown or condensate overflow.

• •Check the weatherstripping around all exterior doors. Press a dollar bill in the door jamb and close the door. If you can pull it out easily, the seal is shot and hot air is pouring in.
• •Take a close look at the caulking on your south-facing and west-facing windows. The desert sun breaks down caulk fast. If you see cracking or gaps, re-caulk before the weekend.
• •If you have single-pane windows, hang thermal blackout curtains. They are cheap and they can drop interior temps by 10 to 15 degrees in rooms that take direct afternoon sun.
• •The garage door seal at the bottom is one people always miss. In Las Vegas, the garage shares a wall with your living space, and that concrete floor radiates stored heat all night long. A worn garage seal means your house never fully cools down.
• •Seal any gaps around pipe and wire penetrations in exterior walls. Grab a can of expanding foam and hit every spot where plumbing, electrical, or cable lines enter the house.

Protect Your Plumbing and Prevent Water Damage

Most people do not realize that extreme heat is one of the biggest causes of water damage I deal with. It sounds backwards, but I see it every summer in this valley. When temperatures spike, AC condensate production goes through the roof. Your cooling system is pulling moisture out of the air and routing it through a drain line. When that line clogs, the water backs up into your ceiling, walls, or flooring. I have responded to homes in Summerlin and Henderson where the homeowner had no idea their AC was dumping gallons of water into their attic until the ceiling started sagging.

Heat also stresses plumbing. PVC pipes in unconditioned spaces like attics and exterior walls expand in extreme heat. Supply line connections at water heaters and washing machines can develop slow leaks that go unnoticed until real damage is done.

• •Inspect your water heater for any signs of moisture, rust, or pooling at the base. Water heaters in Las Vegas garages are exposed to brutal heat. If yours is over 8 years old, it is in the danger zone.
• •Check washing machine supply hoses. Rubber hoses crack faster in dry heat. If yours are original to the house and more than 5 years old, replace them with braided stainless steel lines today.
• •Look at the ceiling below any upstairs AC unit or where ductwork runs through the attic. Water stains, soft spots, or discoloration mean condensate is already leaking.
• •Make sure your water main shutoff valve actually works. Turn it off and on. If it is stuck or corroded, get it serviced. If a line bursts during a heat spike, you need to be able to kill the water supply in seconds, not minutes.
• •If you have an evaporative cooler (swamp cooler) that you are switching over from, drain it completely and disconnect the water supply. Leaving a swamp cooler connected while running your AC creates a mess of crossed systems and potential leaks.

Check Your Attic and Roof

Your attic is the frontline in a heat wave. In direct sun, a Las Vegas roof surface can hit 160 to 180 degrees. If your attic insulation is thin, compressed, or missing in spots, that heat is pushing straight into your living space. I have been in attics in March where the temperature was well over 140 degrees, and the homeowner downstairs could not figure out why their AC was running nonstop but the house never got below 80.

• •If you can safely access your attic, look at your insulation. You should see at least 10 to 14 inches of blown-in insulation or R-38 batt insulation in the Las Vegas climate zone. If you can see the tops of the ceiling joists, you need more.
• •Make sure your attic vents and soffit vents are not blocked by insulation, debris, or stored items. Attic ventilation is critical. Blocked vents turn your attic into an oven that bakes your ceiling and ductwork.
• •Look for any daylight coming through the roof sheathing. Gaps or cracks mean heat is entering and moisture can follow during monsoon season.
• •If your roof is more than 15 years old, schedule an inspection now. Extreme early-season heat accelerates shingle degradation. A roof that looked fine in January may already be showing stress cracks.
• •While you are up there, look at the HVAC ductwork for joints that have come apart or insulation wrap that is damaged. Leaky attic ducts in this heat mean you are air conditioning your attic instead of your house.

Prepare for Power Strain and Outages

Record heat in March catches the power grid off guard too. NV Energy plans for peak load in July and August, not the third week of March. When every home in the valley fires up their AC weeks ahead of schedule, transformer loads spike and localized outages become more likely. If the power goes out for even a few hours in 95-plus degree heat, interior temperatures can climb fast, especially in homes with poor insulation or west-facing exposure.

• •Charge all your devices and portable batteries now. If power drops, you want communication available.
• •Freeze several large water bottles and place them in your refrigerator. They act as thermal mass that keeps food cold longer during an outage and double as emergency drinking water.
• •Know where your nearest Clark County cooling center is located. The county activated centers at community centers and libraries across the valley this week.
• •If you have ceiling fans, run them counterclockwise on high. They do not lower the temperature, but they create a wind-chill effect that makes it feel 4 to 6 degrees cooler and reduces AC load.
• •Close blinds and curtains on all south and west-facing windows by noon. Solar heat gain through glass is one of the biggest cooling loads in a Las Vegas home.

What This Heat Means for the Rest of 2026

I do not have a weather degree, but after years of seeing what heat does to homes in this valley, the pattern is obvious. January 2026 was the fifth-warmest January on record for Las Vegas. February was the second-warmest February since record-keeping started in 1937. Now March just broke the all-time heat record. Las Vegas is on pace for its warmest winter-to-spring transition ever recorded.

For homeowners, this means summer is going to arrive early and stay late. Your AC will log more hours this year than last year. Your water heater, plumbing, and roof will take more punishment. If you have been putting off maintenance, the window to get ahead of it is closing right now.

M&M Restoration Services fields calls every single heat season from homeowners who thought they had more time. The condensate line that was fine last year finally clogs. The water heater that was on its last legs gives out. The attic duct connection that was barely holding lets go. If any of that leads to water intrusion, we are at (702) 475-7575 around the clock. But honestly, spending a few hundred dollars on prevention this week will save you thousands in restoration later.