This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. Plural form of siren.

"One of the most frightening moments in a car that doesn’t involve the actual screeching of brakes or the twisting of metal or the approach of sirens is suddenly noticing you are miles and miles farther along the road than you were the last time you noticed where you were and you have no memory of having covered the distance or of anything you saw between back there and here."

environs