More than 4.2 million vehicles with unrepaired urgent recalls are currently in operation across the nation, according to data from Carfax.

The company said on its blog that the number of vehicles with urgent “do not drive” or “park outside” recalls has increased by more than 65% since May, when Carfax previously reported on them.

Vehicles under “do not drive” recall — which means the automaker and the National Highway Traffic Safety Administration have advised drivers not to operate the vehicles because of a serious safety issue that could lead to an accident or physical harm — have doubled since then, to more than 433,000, Carfax said.

The data also showed “park outside” recalls, issued for vehicles with a high risk of causing a fire, are up by more than 1.4 million vehicles since May. NHTSA advises owners of those vehicles to park them away from any structure, including garages, noting that fires can occur even when the car’s engine is off.

While those urgent recalls affect fewer than 10% of all cars recalled in the U.S., Carfax said its data shows 15 states have more than 80,000 vehicles with unrepaired “do not drive” and “park outside” recalls driving on their roads.

California has the most, with 454,000, followed by Texas (242,000), Florida (237,000), New York (118,000), Pennsylvania (184,000), Georgia (169,000), New York (167,000), Illinois (155,000), North Carolina (152,000), Arizona (121,000), Virginia (116,000), New Jersey (109,000), Tennessee (107,000), Washington (95,000) and Indiana (84,000).

“Despite efforts by state and federal governments — and the auto industry itself — too many consumers are driving in vehicles that have been deemed too dangerous to drive, or that shouldn’t be parked in or near a home for fear of a fire,” Carfax general manager for data Faisal Hasan said.

“Officials and communities need to break through consumer recall notice fatigue and drive home the message: We can save lives today by getting these recalls fixed.”

Owners of recalled vehicles can get repairs specified by the recall done free at a dealership affiliated with the brand of that vehicle.

Carfax reminded consumers that while all recalls should be taken seriously, “do not drive” and “park outside” recalls are more time-sensitive than others, noting that the issues prompting them can result in serious consequences.

As examples, the blog post cited recalls involving Takata airbags, which have killed at least 27 and injured more than 400 from explosions that sent metal shrapnel through the car’s cabin, and fires involving vehicles from Hyundai and Kia, and the electric Chevrolet Bolt.

Carfax said it has been working with the Alliance for Automotive Innovation to involve more states with the Vehicle Recall Search Service, which is used by Arizona, California, Connecticut, Maryland, New York, Ohio and Texas to alert drivers about unfixed safety recalls and help get them repaired.

The free system was launched in 2018, and more than 5 billion VINs have been checked since its launch.