Ottawa Race Weekend changes some start times due to sweltering heat

Ottawa Race Weekend organizers have changed the start times for two of its racesthis weekend to try to avoidtheoverwhelmingheat and high humidity.

Saturday's10 kilometrerace will start at 7 p.m. instead of6:30 p.m., while Sunday'shalf marathon will start at 8:15 a.m. instead of 9 a.m.

The full marathon will still start at 7 a.m. on Sunday.

Environment Canada predicts Sunday's temperature will reach a high of 31 C.

Organizers say they could still stop the races if medical operations become overwhelmed.

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"If runners co-operate fully, we will reduce the chances of overloading our medical operations, which are a critical requirement for safe race events. This plays an important role in making decisions about proceeding with or stopping [races]."

Ottawa paramedics are urging runners to write emergency contact information and a list of what medications they takeon the back of their race bibs in case something happens.

To battle the heat,organizers have added mistingstationsalongthe 10K, half-marathon and marathon routes. They're also bringing in more ice and cups for the water stations.

Four buses will be set up at medical stations on the two longer routes so runners can take a break in an air-conditioned space.

Organizers are even asking non-runners to pitch in. People along the courses are encouraged to run their hoses, sprinklers and have extra water and refreshments ready.

What to do

The race's medical director, Dr. Jon Hooper, hasposted advice on avoiding dehydration and heat illness when running in hot weatheron the event'swebsite:

• Pour water on your head to cool yourself down during the race (along with drinking water).
• Drink ice-cold water and pour some ice-cold water on yourselfright beforethe race.
• Check with your doctor if you're taking medication as overheating can be a side effect.
• Don't try to reach a personal best.
• Drink more fluids than you usually do.
• Wear lightweight, light-coloured clothes and a visor if possible.