A human can go for more than three weeks without food (Mahatma Gandhi survived 21 days of complete starvation), but water is a different story. At least 60% of the adult body is made of it and every living cell in the body needs it to keep functioning.
You cannot raise the rent if you and the tenant have agreed, usually in a written lease, on a certain amount. Usually, you and the tenant will agree on a certain amount for a specific period of time. Once that time period ends, you can raise your rent with 30 (thirty) days written notice. If you and the tenant never agreed on a specific period of time, you can usually raise the rent with 30 (thirty) days written notice.
If you pay your rent by the month or the year, or if you have any kind of fixed-term tenancy, you must give the notice to your landlord at least 60 days before your termination date. EXCEPTION FOR FEBRUARY You can give a little less than 60 days' notice if February is one of the months in your notice period. If you want to move out the last day of February, you have until January 1 to give the notice to your landlord.