The extreme weather warning issued across southern England and parts of the Midlands has seen the British Horseracing Authority abandon four meetings.
On Sunday, Worcester’s National Hunt fixture had already been brought forward to the morning in expectation of high temperatures but now will not go ahead.
The Flat meetings at Salisbury and Kempton have been abandoned along with the jumps fixture at Ffos Las, which falls just outside the official red warning zone, however, it would require participants to travel through the high-risk area to reach the course.
The BHA’s hot weather policy states that where racecourses fall within a red warning zone, the fixture will be abandoned. In addition, horses must not be travelled from or through areas that have red warnings in place.
Carlisle’s meeting in Cumbria is still scheduled to take place, featuring the historic Carlisle Bell and Cumberland Plate.
A press release issued by the BHA on Monday said: "The decision to abandon the fixtures has been taken in conjunction with the racecourses with a view to mitigating any risk to the health and wellbeing of equine and human participants.
"The BHA will continue to liaise with racecourses hosting fixtures in amber warning zones this week to consider any further mitigations that may be needed, in line with the BHA’s
hot weather policy."Each fixture will be managed on a case-by-case basis, with several factors considered according to the local weather forecast and environmental conditions.
"Trainers are reminded that horses should not be moved from or through any areas where red heat warnings are in place.
"Further updates to be issued where necessary."