A flash flood warning was issued by the National Weather Service on Wednesday at 11:44 p.m. in effect until Thursday at 12:45 a.m. for Middlesex, Norfolk, Plymouth and Suffolk counties.
“At 11:44 p.m., Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 0.5 and 1 inch of rain has fallen. The expected rainfall rate is 1 to 2 inches in 1 hour. Additional rainfall amounts up to 1 inch are possible in the warned area. Flash flooding is ongoing or expected to begin shortly,” says the weather service. “Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas.”
Locations impacted by the warning include Boston, Cambridge, Quincy, Lynn, Newton, Somerville, Waltham, Malden, Brookline, Medford, Weymouth, Revere, Arlington, Everett, Braintree, Chelsea, Natick, Randolph, Watertown and Lexington.
The weather service adds, “Turn around, don’t drown when encountering flooded roads. Most flood deaths occur in vehicles.”
Understanding the differences between advisories, watches, and warnings
- Flash flood warning: Take action!
A flash flood warning is issued when a flash flood is imminent or occurring. If you are in a flood-prone area, move immediately to high ground. A flash flood is a sudden violent flood that can take from minutes to hours to develop. It is even possible to experience a flash flood in areas not immediately receiving rain.
- Flood warning: Take action!
A flood warning is issued when flooding is imminent or occurring.
- Flood advisory: Be aware:
A flood advisory is issued when flooding is not expected to be bad enough to issue a warning. However, it may cause significant inconvenience, and if caution is not exercised, it could lead to situations that may threaten life and/or property.
- Flood watch: Be prepared:
A flood watch is issued when conditions are favorable for flooding. It does not mean flooding will occur, but it is possible.
Be flood-ready: Expert guidance from the weather service for your safety
In flood-prone regions or while camping in low-lying areas, understanding and following the weather service flood safety guidelines can be a lifesaver:
1. Move to higher ground:
- If you’re in a flood-prone area, or if you’re camping in a low-lying spot, move to higher ground as a first step.
2. Adhere to evacuation orders:
- If local authorities issue an evacuation order, heed it promptly. Prior to leaving, secure your home by locking it.
3. Disconnect utilities and appliances:
- If time permits, disconnect your utilities and appliances. This precaution minimizes electrical hazards during flooding.
4. Avoid basements and submerged areas:
- Steer clear of basements or rooms where water has submerged electrical outlets or cords. This helps prevent electrical accidents.
5. Evacuate promptly for safety:
- If you notice sparks or hear buzzing, crackling, snapping, or popping sounds, evacuate without delay. Do not enter water that may carry an electrical charge.
6. Stay away from floodwaters:
- Never attempt to walk through floodwaters, even if they appear shallow. Just 6 inches of fast-moving water can forcefully sweep you off your feet.
7. Seek higher ground when trapped:
- In the event you become trapped by moving water, make your way to the highest point available and contact emergency services by calling 911.
During periods of intense rainfall, the risk of flooding increases, particularly in low-lying and flood-prone areas. It is imperative to avoid driving through any water on the road, even if it seems shallow. According to the weather service, most cars can be swept away by just 12 inches of rushing water. Prioritize your safety by staying informed and prepared.
Rainy roadways ahead: Essential safety tips for heavy rain
When heavy rain strikes, safety is paramount. Equip yourself with these guidelines from the weather service to navigate wet roads and avoid hazards:
Beware of swollen waterways:
- Avoid parking or walking in close proximity to culverts or drainage ditches, as the swiftly moving water during heavy rain can potentially carry you away.
Maintain safe driving distances:
- Adhere to the two-second rule for maintaining a safe following distance behind the vehicle in front of you. In heavy rain, allow an additional two seconds of distance to compensate for reduced traction and braking effectiveness.
Reduce speed and drive cautiously:
- On wet roads, slowing down is paramount. Gradually ease off the accelerator and avoid abrupt braking to prevent skidding.
Choose your lane wisely:
- Stick to the middle lanes on multi-lane roads to minimize the risk of hydroplaning, as water tends to accumulate in outer lanes.
Visibility matters:
- Enhance your visibility in heavy rain by activating your headlights. Be particularly vigilant for vehicles in blind spots, as rain-smeared windows can obscure them.
Watch out for slippery roads:
- The first half-hour of rain is when roads are slickest due to a mix of rain, grime, and oil. Exercise heightened caution during this period.
Keep a safe distance from large vehicles:
- Don’t follow large trucks or buses too closely. The spray created by their large tires reduces your vision. Take care when passing them as well; if you must pass, do so quickly and safely.
Mind your windshield wipers:
- Heavy rain can overload the wiper blades. When visibility is so limited that the edges of the road or other vehicles cannot be seen at a safe distance, it is time to pull over and wait for the rain to ease up. It is best to stop at rest areas or other protected areas.
- If the roadside is your only option, pull off as far as possible, preferably past the end of a guard rail, and wait until the storm passes. Keep your headlights on and turn on emergency flashers to alert other drivers of your position.
In the face of heavy rain, these precautions can make a significant difference in ensuring your safety on the road. Remember to stay informed about weather conditions and heed guidance from local authorities for a secure journey.
Advance Local Weather Alerts is a service provided by United Robots, which uses machine learning to compile the latest data from the National Weather Service.
