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Heavy rain changes driving fast. Visibility drops, stopping distances grow, lane markings disappear, and shallow-looking water can hide potholes or stalled vehicles. Preparing before the forecast turns ugly is much easier than trying to solve problems from the driver's seat in a downpour.

Start with visibility. Inspect wiper blades for cracks, torn edges, skipping, or streaking. If they smear the windshield in light rain, they will be worse in heavy rain. Clean the windshield inside and out, because oily film increases glare from headlights and streetlights. Fill washer fluid and test the spray pattern. Make sure the defroster clears the glass quickly, since humid air can fog windows even when it is not cold.

Check tires and wipers first

Check exterior lights. Rain makes it harder for other drivers to judge distance, so working lights matter. Test headlights, brake lights, turn signals, hazard lights, and tail lights. Use headlights in rain even during the day if visibility is reduced. Avoid relying only on automatic light settings; some systems do not turn on tail lights in every rainy or dim condition.

Tires are your connection to wet pavement. Check pressure when cold and inspect tread depth across the full width of each tire. Worn tires are more likely to hydroplane, especially at highway speeds or in rutted lanes where water collects. Uneven wear can also reduce grip. If the car vibrates, pulls, or has visibly damaged tires, fix the issue before storm season driving.

Clear drainage areas

Look at drainage areas on the car. Clear leaves and debris from the base of the windshield, sunroof channels if accessible according to the manual, and trunk or hatch seals. Blocked drains can send water into places it should not go. Inspect door weatherstripping for obvious tears or gaps. A small leak can soak carpet and create electrical or odor problems if ignored.

Stock a modest rain kit. Useful items include a flashlight, absorbent towel, spare socks, a compact umbrella or rain jacket, phone charging cable, and a plastic bag for wet items. Keep them secured, not rolling around the cabin. If you commute through flood-prone areas, add a printed alternate route in case navigation directs you toward a low crossing.

Pack for visibility and delay

Change your driving before the road forces you to. Slow down, increase following distance, and make inputs gently. Hard braking, sharp steering, and sudden acceleration are more likely to break traction on wet pavement. Leave extra space around large vehicles, which throw spray that can blind you for several seconds. If visibility becomes poor, turn on lights and reduce speed without stopping in a travel lane.

Understand hydroplaning. It happens when the tires ride on water instead of pavement. The steering may feel light, the engine may rev, or the car may drift. Do not slam the brakes or jerk the wheel. Ease off the accelerator, keep the wheel pointed where you want to go, and let the tires regain contact. Good tires and lower speeds reduce the risk, but no tire can ignore deep water at speed.

Change how you drive in heavy rain

Standing water deserves caution. You often cannot tell how deep it is, whether the road surface is damaged, or whether a current is moving across it. Turn around if water covers the road and you cannot confirm it is shallow and safe. Driving through water can stall the engine, damage electronics, contaminate fluids, or sweep a vehicle off course. The risk is not worth saving a few minutes.

If you must pass through a shallow puddle that is clearly safe, go slowly and steadily. Avoid creating a bow wave. Afterward, gently test the brakes when traffic allows by applying light pressure to dry them. If the engine stumbles, warning lights appear, or the car behaves strangely after water exposure, stop safely and get help.

Inspect the car after storms

Plan parking during storms. Avoid low spots, blocked drains, and areas under weak branches. If your usual street floods, move the car before the storm arrives. After heavy rain, check carpets, trunk wells, and spare tire areas for moisture. Early drying can prevent odors and corrosion.

Rain preparation is mostly ordinary maintenance plus conservative decisions. Clear glass, good wipers, working lights, sound tires, and a willingness to turn around are the pieces that matter most when water starts covering the road.