Summary from the original article

Health officials have been forced to investigate after dozens of runners were hospitalised during an event on Sunday.
By Anna Beisser ·
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Upgrade this server"The cause of the reported symptoms has not been confirmed."
20 hours ago · sports.yahoo.com
Health officials have been forced to investigate after dozens of runners were hospitalised during an event on Sunday.
20 hours ago · 7news.com.au · You are reading this one
The Santa Barbara County Health Department said that the cause of the incident remains under investigation after 30 participants received medical treatment.
Yesterday · globalnews.ca
Nach einem Halbmarathon in Santa Barbara hat die Polizei Ermittlungen aufgenommen. 25 Teilnehmer mussten wegen „ungewöhnlicher“ Symptome ins Krankenhaus.
Yesterday · focus.de
A local hospital says runners had "unusual" symptoms after racing on an atypically hot day.
2 days ago · bbc.co.uk
Roughly 7,500 people participated in the event, which spanned 13.1 miles along the Pacific Ocean
2 days ago · independent.co.uk
Roughly 7,500 people participated in the event, which spanned 13.1 miles along the Pacific Ocean
2 days ago · sports.yahoo.com