Calderdale is set for a scorcher with high temperatures predicted throughout the day (Wednesday).
There will be with lows of 14C and highs of 19C.
On the roads, queues are starting to form on major roads in Calderdale.
Traffic on the A629 Cow Green in Halifax is busy but moving in both directions at the Bull Green junction.
On the A58 Aachen Way in Halifax traffic is busy but moving at the Queen’s Road junction.
Traffic on the A58 Wharf Street in Sowerby Bridge is busy but moving in both directions at the A6139 Tuel Lane junction.
There are no reported problems on the trains and buses.