Richmond Runfest was halted on Sunday over safety fears because of the 30-degree heat.
Medics were thanked by race director Tom Bedford for preventing a bad situation from becoming worse.
He admitted that medical provisions were clearly not enough in the hot conditions.
He issued the following statement
I’ve personally spoken to all of the event medics and thanked them for their heroic efforts yesterday. It may be their job but they certainly stopped a very bad situation from being worse. As part of our contingency we had the most medical provision we’ve ever had at our event over the last 11 years but it clearly was not enough in the hot conditions we faced. We’ve already booked in a full debrief meeting for next week to review the events medical response and improvements that need to be made. A big problem with yesterday was not the number of medics but lack of medical transportation which eventually lead to the event being cancelled. Thankfully London Ambulance Services came to our event and allowed us to safely take control of the situation. This is the first time in 11 years that we have required this additional assistance and again my thanks go out to them.