As wildfires roar into residential neighborhoods, firefighters in California and elsewhere are finding that water systems can’t keep up with the demand.

Water experts dismissed Trump’s claims that California water policy is to blame for dry hydrants. But Los Angeles is also unprepared for the age of urban wildfires.

Though wildfires have always happened, warming global temperatures are making them more frequent and severe. For instance, scientists calculated last year that our overheating planet has contributed to a 172% increase in areas burned by wildfires in California since the 1970s.