Firefighters say they gave the animals oxygen with specialised masks after rescuing them.
The fire service urges residents to take care when storing e-scooters.
The operator of an incinerator is also investigating, having faced its own water issues.
The government says the new barriers would be installed at "fare dodger hotspots".
A trespass incident is causing services to be delayed, amended or cancelled.
Anthony Canty was knocked off his bicycle and an 18-year-old has since been arrested, police say.
The vehicles, on fire on the hard shoulder, causes several miles of traffic queues.
Residents say a wedding fireworks display "sounded like bombs" and could be heard nine miles away.
The government says it will no longer fund the 420-place Lodge Farm school in Witham, Essex.
