The Federal Emergency Operations Center (FEMA) has issued an emergency advisory about the ongoing drought.
The advisory, issued on Friday, warns people to keep an eye on water levels in their taps.
The agency also urged residents to use water sparingly and to treat their water well before and after showering.
It is also recommending that businesses consider using bottled water as a precaution to help prevent illness or other waterborne illnesses, and advises people to use a filter on their tap and shower frequently.
The drought has caused widespread damage to crops, livestock, and homes in California.
The state is in the midst of the worst drought in decades.
The area has experienced its worst winter snowfall on record, and water levels are expected to drop further as the drought continues.
The drought is expected to continue into next week.