WATCH: The moment sirens were tested this morning
The flood warning sirens in Todmorden, Hebden Bridge and Mytholmroyd have been sounded this morning as part of a live training exercise across the Calder Valley.
Calderdale Council is holding its biggest ever live training exercise and the Environment Agency is taking the opportunity to test the flood sirens.
Operation Calderdale16 tests the emergency response of the Council, the Environment Agency, emergency services and partners to a major flooding incident, including a live search and rescue.
The Environment Agency uses the sirens to warn the Upper Calder Valley communities when rivers are expected to flood. There are eight sirens in the area with an audibility level similar to that used by emergency vehicles.
The sirens were tested earlier this morning.
Tests lasted for two minutes. Residents and businesses in the towns did not need to take any action when hearing the sirens sounded. Loud hailer vehicles were used to alert people to the tests, ahead of the sirens being sounded.