How Extreme Heat Increases Your Crash Risk on Macomb County Roads [Summer Safety Guide]

Metro Detroit’s first summer heat wave of 2026 is arriving this week, with temperatures forecast to climb well into the 90s by midweek and heat index values potentially reaching triple digits. As the mercury rises across Macomb County, Wayne County, and Oakland County, drivers need to understand something that most people overlook entirely: extreme heat does not just make driving uncomfortable — it makes it measurably more dangerous. The risks come from multiple directions at once, affecting your vehicle, the road surface beneath your tires, and your own ability to focus and react behind the wheel.

Here is what every Macomb County driver needs to know before hitting Hall Road, Gratiot, Van Dyke, or any other major corridor this week.

Tire blowouts spike dramatically during heat waves — and Macomb County’s highways are especially vulnerable.

Tires are your vehicle’s only contact with the road, and they are the component most directly compromised by extreme heat. For every 10 degrees Fahrenheit of ambient temperature increase, tire pressure rises by approximately 1 to 2 PSI. In a heat wave that pushes ambient temperatures into the 90s — with road surface temperatures on Michigan asphalt climbing far higher — already stressed or underinflated tires face conditions they were not designed to handle safely. Hot air expands the air inside the tire, overinflating it and accelerating wear. If the tire is already worn, underinflated, or carrying a heavy load, the combination of highway speeds and extreme heat creates the conditions for a sudden blowout.

On Macomb County’s freeways — I-94, I-696, M-59, and M-53 — a blowout at highway speeds is not a minor inconvenience. It is a crash event. A driver who loses a tire at 70 mph on I-696 near Mound Road has fractions of a second to respond before the vehicle begins to veer. Blowout crashes frequently involve rollovers, lane departures, and secondary collisions with other vehicles. Before this week’s heat wave arrives in full force, check your tire pressure against the manufacturer’s recommended levels, inspect tread depth, and look for any signs of cracking or sidewall damage. If your tires are worn, this week is not the week to put off replacing them.

Engine overheating and vehicle breakdowns create dangerous roadside hazards.

Extreme heat pushes cooling systems to their limits — particularly during long drives, stop-and-go traffic on Hall Road and Van Dyke, and extended idling on congested Macomb County freeways. When an engine overheats, a vehicle can stall abruptly in a travel lane or on a freeway shoulder, creating an immediate danger for both the disabled driver and other motorists. The same conditions that cause breakdowns — extended driving in high heat with air conditioning running at full capacity — are exactly the conditions Macomb County drivers will face this week during the morning and evening commutes.

Before heading out this week, check your coolant levels and inspect radiator hoses for signs of swelling, cracking, or leaks. If your temperature gauge begins climbing while you are on the road, turn off the air conditioning, switch the heater on to pull heat away from the engine, and look for a safe place to pull off the road — not on the freeway shoulder if possible, where the risk of being struck by passing traffic is significant. Michigan’s Move Over Law requires other drivers to change lanes or slow down when passing a stopped vehicle on the shoulder, but compliance is imperfect and freeway shoulders remain one of the most dangerous places a driver can be stopped.

Heat impairs the driver, not just the vehicle.

The physical effects of extreme heat on human performance behind the wheel are well-documented and often underestimated. Dehydration — even mild dehydration — reduces reaction time, impairs judgment, and causes the kind of attention lapses that result in rear-end crashes and intersection failures at exactly the high-traffic Macomb County intersections where crashes already concentrate. Heat exhaustion, which can develop gradually during a long drive in a hot vehicle, produces headaches, confusion, and dizziness — symptoms that are dangerous at highway speeds and in heavy traffic.

Drivers who do not have functional air conditioning face the highest risk. A vehicle interior in 90-degree heat can reach temperatures far above the ambient air temperature within minutes, and a driver sitting in that environment for an extended commute on Hall Road or Gratiot Avenue is operating with meaningfully reduced cognitive capacity before they even reach their destination. If your air conditioning is not working properly, have it serviced before this week’s peak heat days arrive. It is not a luxury in a Michigan heat wave — it is a safety system.

Road surfaces soften in extreme heat — and that changes how your vehicle handles.

Michigan’s asphalt roads respond to extreme heat in ways that most drivers never consider. When road surface temperatures climb — which they do dramatically faster than air temperatures, often reaching well above 130 degrees on black asphalt during a 90-degree day — the asphalt softens and can become slightly sticky. This changes the handling characteristics of your vehicle in subtle ways: braking distances can increase, and vehicles can track differently through curves. Rutting and surface irregularities that were stable in cooler temperatures can become more pronounced. On roads with existing pavement issues — and Macomb County has no shortage of those — the combination of softened asphalt and increased traffic volume during a heat wave creates surface conditions worth approaching with extra caution.

What Macomb County drivers should know about their legal rights when heat-related crashes occur.

When a tire blowout, a vehicle breakdown, or heat-impaired driving causes a crash that injures another person, the legal consequences are the same as any other negligence-related crash under Michigan law. Drivers have a duty to maintain their vehicles in safe operating condition, including their tires and cooling systems. A driver’s maintenance decisions may become an important factor in determining liability after a heat-related crash. When worn tires, inadequate maintenance, or other preventable vehicle issues contribute to a collision, those facts may be examined as part of any resulting insurance claim or civil case. An experienced auto accident attorney can investigate the vehicle maintenance history, tire condition records, and the specific circumstances of any heat-related crash to identify all responsible parties and all available insurance coverage.

Michigan’s no-fault insurance system will provide initial coverage for medical expenses and wage loss regardless of fault, but when another driver’s failure to maintain their vehicle safely causes serious injury, the injured party’s right to pursue a liability claim for pain and suffering, permanent impairment, and other non-economic losses is fully intact. The summer months, when crash rates rise and heat-related vehicle failures increase, are when that right matters most.

If you were injured in a crash on any Macomb County road this summer, our team is here to help you understand your legal rights and fight for every dollar of compensation you are entitled to under Michigan law. We proudly serve clients throughout Macomb County, Warren, Sterling Heights, Clinton Township, Shelby Township, and the surrounding Metro Detroit communities. To speak with an experienced Michigan personal injury attorney, contact us today.