How Summer Heat Contributes to Serious Vehicle Accidents

Summer heat can contribute to serious vehicle accidents in Pennsylvania by making drivers more tired or uncomfortable and by stressing vehicles, tires, and other equipment. Heat isn’t automatically responsible for a crash, but it can significantly worsen an already dangerous situation.

In Pennsylvania, where summer travel brings heavy traffic, long highway trips, and high temperatures, those factors can matter when determining how a crash happened. If heat-related conditions may have contributed to your crash, our Pennsylvania car accident lawyers at Conlon Tarker P.C. can investigate whether driver behavior, a vehicle problem, or another factor was responsible.

How Summer Heat May Affect Pennsylvania Drivers

Fatigue and Drowsiness

Long drives in hot weather can leave people tired, especially when they are already sleep-deprived. Fatigue slows reaction time and can affect judgment, attention, and vision. PennDOT (Pennsylvania Department of Transportation) warns that drowsy driving can have effects similar to alcohol impairment. It also reports 2,612 Pennsylvania crashes involving a drowsy or asleep driver in 2024, with 15 fatalities. A tired driver may miss a slowing vehicle, drift into another lane, or react too late to avoid a crash.

Dehydration

Hot weather can cause drivers to lose fluids through sweating. Dehydration and heat-related illness can cause weakness, dizziness, headaches, and, in more serious cases, confusion or an altered mental state. Those symptoms can make driving harder and, in serious cases, leave someone unable to drive safely.

Irritability and Risky Driving

Heat and discomfort, especially during long summer drives, can also make a stressful drive harder. A frustrated driver may speed, follow too closely, change lanes aggressively, or make other unsafe choices. PennDOT reported 5,897 aggressive-driving crashes in Pennsylvania in 2024, resulting in 405 suspected serious injuries and 105 deaths. The important question after a crash isn’t simply whether it was hot. It’s whether the driver’s choices contributed to what happened.

Vehicle and Environmental Factors Can Contribute to Crashes

Tire Blowouts

Heat can stress tires, especially when they are underinflated, worn, or damaged. Drivers must keep their tires properly inflated and in good condition because a blowout can cause a vehicle to pull sharply or become difficult to control. Pennsylvania law also requires vehicles operated on the state’s highways to have tires that are in safe operating condition under 75 Pa.C.S. § 4525.

Hot Pavement and Road Conditions

Summer also brings road construction, heavy traffic, and changing pavement conditions across Pennsylvania. Road work, poor signage, debris, or another roadway problem can become part of a crash investigation when those conditions contributed to what happened.

Overheating Engines

High temperatures can put additional demands on a vehicle’s cooling system. An overheating vehicle may lose power or break down in an active traffic lane, creating another hazard for the driver and nearby motorists. Whether poor maintenance contributed is a separate question. Vehicle inspection and maintenance records may help answer it.

Sun Glare

Bright summer sunlight can make it harder to see traffic, pedestrians, signals, or vehicles ahead. A driver who can’t see clearly may need to slow down or adjust their driving. Continuing at an unsafe speed despite poor visibility can contribute to a crash.

When Does Summer Heat Become a Liability Issue in Pennsylvania?

Heat alone usually doesn’t determine who is responsible for a crash. The more important question is what the heat contributed to. For instance, if a tire fails, investigators may need to determine whether the failure was unavoidable or whether worn tires, improper inflation, defective parts, or poor maintenance contributed to the crash. Depending on the evidence, responsibility could involve another driver, a vehicle owner, a trucking company, a repair shop, or a manufacturer.

Speak With Our Pennsylvania Car Accident Attorneys

A summer vehicle accident may involve more than high temperatures. If you were seriously injured in a crash, our Pennsylvania car accident lawyers can investigate the circumstances and determine whether another person or company may be legally responsible. Request a free case evaluation by contacting Conlon Tarker online or at 724-285-7700.