E. coli levels should stay at or below 900 colony-forming units per 100 milliliters for “sufficient” water quality, according to World Triathlon. Only 1 of 4 test sites along the Seine showed levels below that limit, AP reports.

Training events had already been postponed with elevated bacteria levels following the downpour over the opening ceremony. Heavy rain can overwhelm sewage and wastewater systems, allowing untreated water to reach the river.

There’s more rain in the forecast for Paris tonight. But for now, both the women’s and the men’s triathlon events are scheduled for Wednesday at 8AM and 10:45AM local time, respectively. There’s also a backup date of August 2nd.

Seems to be pretty shitty odds of this happening on Wednesday