He hydroplaned. In a crash report or an adjuster’s letter the word sounds like an explanation and a verdict at once, as if the rain had taken the wheel. Hydroplaning is real, and it happens to tires. It almost always has a speed and a tire in it, and both of those were somebody’s choice.
Hydroplane. The Texas Department of Insurance puts it simply: hydroplaning “happens when the water in front of the tires builds up faster than the vehicle’s weight can push water out of the way” (Texas Department of Insurance). The tire rides up onto the water, and steering and braking can go with it. It does not take a flood. The federal model manual for commercial drivers says “It does not take a lot of water to cause hydroplaning,” that it “can occur at speeds as low as 30 mph if there is a lot of water,” and that it “is more likely if tire pressure is low, or the tread is worn” (Model Commercial Driver License Manual).
The count. Rain is the deadliest weather on American roads. Over the five years from 2019 through 2023, crashes in rain averaged about 574,000 a year, injuring about 219,000 people and killing 2,810, about three of every four deaths in weather-related crashes (Federal Highway Administration). For trucks, the federal safety agency reports that 23 percent of large-truck crashes happened when the truck driver was going too fast for conditions, and it warns that “when it first starts to rain, water mixes with oil on the road making it particularly slippery” (FMCSA).
The rules. Every Texas driver has to keep to a speed that is “reasonable and prudent under the conditions and having regard for actual and potential hazards then existing,” and slow down when “a special hazard exists with regard to traffic, including pedestrians, or weather or highway conditions” (Transportation Code Section 545.351). The rule for truck drivers is more specific: “Extreme caution in the operation of a commercial motor vehicle shall be exercised when hazardous conditions, such as those caused by snow, ice, sleet, fog, mist, rain, dust, or smoke, adversely affect visibility or traction. Speed shall be reduced when such conditions exist.” If conditions become “sufficiently dangerous,” the truck has to stop until it “can be safely operated” (49 CFR 392.14). The federal agency’s own advice is to cut speed by a third on a wet road, from 60 to 40 (FMCSA).
The tires. Tread is the channel that carries water out from under the tire, and a worn or underinflated tire runs out of room for it. A truck’s front tires must keep at least 4/32 of an inch of tread and its other tires 2/32 (49 CFR 393.75), and the federal advice for every car is that tires “are not safe and should be replaced when the tread is worn down to 2/32 of an inch” (NHTSA).
What it does in court. Hydroplaning is the defense’s word for a crash nobody chose. The law’s question is different: whether a careful driver, on those tires, in that rain, would have been going that fast. A wet road is a classic setting for the instruction Texas calls unavoidable accident, which “is ordinarily given in cases involving environmental conditions such as fog, snow, sleet, wet or slick pavement, or obstruction of view,” but which “is proper only when there is evidence that the event was proximately caused by a nonhuman condition and not by the negligence of any party to the event” (Reinhart v. Young, citing Hill v. Winn Dixie Texas). It is also where the argument Sudden Emergency takes apart comes up: an emergency that the driver’s own negligence, like too much speed for the rain, helped cause is not the one the instruction describes.
The proof. The tires themselves, measured in the main grooves, with their pressure and age. The truck’s inspection and maintenance file, which federal law requires the carrier to keep up (49 CFR 396.3), the subject of The Jackknife. The speed the vehicle’s recorder logged. The rainfall and the standing water at that hour, and photographs taken before the tow. A tire that is replaced or scrapped cannot be measured, which is why Spoliation matters from the first day.
Rain is not an excuse by itself. It is a condition, and the law has already told every driver what to do about it: slow down.
The science and the data: Texas Department of Insurance, Driving in Bad Weather fact sheet, HS20-007A (09-20); Model Commercial Driver License Manual (2005, rev. July 2010), section 2.6.2; FHWA Road Weather Management, How Do Weather Events Impact Roads? (five-year averages, 2019 to 2023); FMCSA, CMV Driving Tips: Too Fast for Conditions; NHTSA, Tires. The law: Tex. Transp. Code § 545.351; 49 CFR 392.14, 393.75, and 396.3; Reinhart v. Young, 906 S.W.2d 471 (Tex. 1995) (citing Hill v. Winn Dixie Texas, Inc., 849 S.W.2d 802 (Tex. 1992)). General information, not legal advice.
