Each school's headteacher and chair of governors decide whether to close the school in bad weather conditions (for example, heavy snow).
BBC Three Counties Radio (103.8FM / 92.1FM / 90.4FM / 630MW / 1161MW)
The whole of Hertfordshire.
Heart 101.7 Essex for Harlow
Hertford, Ware, Cheshunt, Broxboune, Bishop's Stortford, Hoddesdon, Sawbridgeworth and Much Hadham.
Heart 96.6 Hertfordshire
Watford, Hemel Hempstead, St Albans, Rickmansworth, Berkhamsted, Redbourn, Borehamwood, Kings Langley and Radlett.
Mix 96 (96.2FM)
Tring and Berkhamsted
106 Jack FM Hertfordshire
Stevenage, Letchworth, Welwyn Garden City, Hatfield, Hitchin, Ware and Hertford.
Heart 103 Cambridgeshire
Heart 96.9 Home Counties
Letchworth, Hitchin and Baldock.
Heart 97.6 Home Counties for Beds, Bucks, Herts
St Albans, Stevenage, Hemel Hempstead, Hitchin, Berkhamstead and Harpenden.
Radio Verulam 92.6
St Albans, Harpenden, London Colney, Colney Heath, Radlett and Shenley.
Watford's Vibe 107.6FM
Watford, Rickmansworth and Kings Langley.