Evaporation does most of the damage in a Texas summer pour. Fresh concrete needs its water for two jobs, working for the finishers and hydrating the cement, and a hot, dry wind pulls that water off the surface faster than it can bleed up from below. The top crusts over while the concrete underneath is still plastic, the surface shrinks and cracks, and a slab that looked fine at noon is covered in fine map cracks by the next morning.
Heat adds a second problem. Warm concrete stiffens quickly, so finishers have less time, cold joints form between loads and the slump drops on the way to the site. Hydration accelerates as well, and concrete placed hot can reach a high early strength and finish with less long-term strength than the same mix placed cool.
Most of the state lives with some version of this. We pour in desert heat in the west, on windy open plains in the Panhandle and South Plains, and in the humid heat of the coast, where the air feels wet and the concrete still dries. The tools are similar everywhere: control the mix temperature, cut the evaporation rate and cure early.
Texas conditions that test a pour
Pecos, on I-20 in Reeves County, is described as a semiarid to desert city with average annual precipitation of about 10.48 inches and a record high of 118 degrees. In that kind of air, concrete loses moisture quickly even before the sun is high, and nothing about a pour there is routine. The shops, yards and pads that oil, gas and midstream operators build across the Permian region have to be poured in conditions that few contractors ever see.
Wind is the other driver. On March 14, 2025, the Amarillo airport recorded a record 83 mph gust, with visibility below a quarter mile in blowing dust and a multi-vehicle pileup south of Canyon, according to the National Weather Service. Not every wind day is that extreme, but the Panhandle and South Plains are open country, and a 20 mph breeze across a fresh slab can strip water faster than a hot day with no wind at all. Dust adds contamination and surface defects when it settles on wet concrete.
Control the mix, the air and the clock
We begin with the mix. We work with the supplier on a hot-weather design with a retarder or water reducer, a controlled water content and cool materials, with ice or chilled water in the batch when the specification limits the concrete temperature at placement, commonly around 90 to 95 degrees. We shorten the haul, line up the trucks so none wait in the sun and wet the subgrade and forms before the concrete arrives.
On the slab, we check the evaporation rate with temperature, humidity, wind and concrete temperature, using a chart or app. When the rate approaches the level where plastic cracking becomes likely, we respond: windbreaks, fogging above the surface, evaporation retarder sprayed after screeding and early application of curing compound or wet cover. Finishing is timed to the concrete, not the schedule, and extra finishers are on hand so no section waits.
Pour at dawn, or after dark
The simplest control is time. Placement at first light or in the evening keeps temperatures lower and reduces the number of hours of intense sun on the surface. For large flatwork, we start before sunrise, with lights, and finish the heavy work in the cooler hours. For extremely hot days, we move the pour to night and set up for it in advance.
The same thinking applies to industrial sites in growth areas, and to thick placements, where hot concrete and mass concrete pours make a poor pair. Reese Technology Center west of Lubbock began construction in 2025 on the 90-acre East 90 Business Park, with first-phase roads and infrastructure planned, a project type where the flat, open ground and strong summer wind make early starts essential. We coordinate with the batch plant on loading times, with the general contractor on access and with inspectors who need to be present for the pour. We plan Lubbock and Amarillo pours around the same early-start logic.
Protecting the crew as well as the slab
A concrete crew in July works in dangerous heat. We provide water, shade and scheduled breaks, watch for heat illness in each other and shift hours so the hardest labor happens when it is coolest. New workers get time to acclimate. Silica and dust controls matter more in wind, and eye and respiratory protection are used when blowing dust is present.
Fresh concrete on a hot day also burns skin and eyes faster, since the alkaline mix and sun combine, so washing stations and protective gear are standard. If winds climb to a level that makes pumping booms or crane work unsafe, we stop. The same discipline applies on a work platform at height or next to concrete pumping equipment.
What specifications require in heat
Standards for hot weather concrete generally define it as conditions that threaten properties of fresh or hardened concrete, such as high temperatures, low humidity, wind and sun. Specifications commonly cap concrete temperature at placement, require measures when the evaporation rate nears a stated limit and demand early curing. Many owners require a hot-weather plan submitted before the pour, much as the cold weather concrete plan is, and we prepare it with our testing and quality control team.
Texas sets the International Building Code as the municipal floor, with cities free to adopt later editions and amendments, so the base code reference differs by location. The project specification and the engineer decide the details, and we follow them.
Pour in the cool part of the day
Tell us the date, the slab size and the location. We will work out the mix, the schedule and the protection with your supplier and your engineer, and put the cost of the heat plan in the proposal.
Common Questions
What is the maximum concrete temperature you will place?
It depends on the specification, and many projects set a limit in the range of 90 to 95 degrees at the point of placement. If the load is warmer than allowed, we reject or adjust it, and we plan the mix and the haul so that does not happen.
How do you prevent plastic shrinkage cracks?
We keep the surface from drying faster than it bleeds. That means a cool mix, a wet subgrade, windbreaks, fogging when needed, evaporation retarders after screeding and fast curing. The cracks form in the first hours, so the response has to come then.
Do you pour at night in summer?
When the forecast demands it. Night pours cost more for lighting, labor and inspection, but they save slabs on very hot days. We discuss that option with the owner during planning.
Can wind stop a pour even if the temperature is mild?
Yes. A strong, dry wind can trigger the same evaporation problem as a hot day, and a stiff wind also blows dust into the surface and makes a pumping boom unsafe. We watch gusts as closely as temperature.
What does curing look like in heat?
It starts as soon as finishing allows. We apply curing compound or cover with wet burlap or sheeting, and we keep the surface moist for the specified period. Skipping early cure in the heat is the most common cause of surface dusting and cracking.