San Francisco experienced the hottest temperature ever recorded in the city on Saturday, with the mercury rising to 106 degrees Fahrenheit (40 degrees Celsius). In city where most buildings don’t have air conditioning, the heat was oppressive.

It was so hot that the San Francisco International Airport had to shut down its AirTrain service, which connects the airport to public transportation. Although the airport remained open (unlike Phoenix’s airport, which recently had to shut down due to excessive heat), travelers were told to use airport shuttles to get to either the parking lot or BART, the Bay Area’s rapid public transportation system.

If you were affected by the AirTrain outage, let me know in the comments!