Some officers have dealt with their patrol vehicles being submerged in flood waters. Others have left their devices on top of their vehicles and they've slid off. If their devices are rugged, chances are once they retrieve them they'll still keep working.
That's why many agencies are willing to spend the additional money on rugged laptops, tablets, and phones for use on duty. Rugged computers are generally understood to meet the requirements set out by military standards (MIL-STD) that measure a device's ability to withstand extreme environments and abuse. Other agencies are willing to use cases to protect their devices as best they can and replace them if they break. Either way, it's best to be aware of the limitations of your device.
What you need will depend on the environment you're working in on duty. A major component is temperature, which is part of MIL-STD-810, which covers environmental effects on equipment. If you live where winters get snowy and frigid, you'll need devices that won't shut off and will continue to fully function in sub-zero temperatures. "Most consumer devices shut off before damage occurs in extreme temperatures," says Nollmann. "But in law enforcement you need screen heaters and hard drive heaters so the system will boot up immediately and display the info the officer's looking for." Similarly, if officers leave their devices in a hot patrol car during lunch on a summer day, they need to stay on and manage the heat so when the officers come back to the car they still have access to information to keep them safe as soon as they need it.
MIL-STD-810 also covers rain (including windblown and freezing rain); humidity, fungus, salt fog for rust testing; sand and dust exposure; explosive atmosphere; leakage; acceleration; shock and transport shock; gunfire vibration; and random vibration. Most ruggedized handheld computers can withstand a four-foot drop to concrete, which can come in handy on duty.
Many devices made for law enforcement are designed to remain fully functional in rain and with displays that are clearly visible in bright sunlight. But it's best to know beforehand what your device can take instead of finding out the hard way in the middle of a call.