In all of the resources below, remember that dialysis patients must still control their fluid intake. For tips on Dialysis Fluids Management in English, see https://s3-us-west-2.amazonaws.com/nwrn.org/files/NW18/Fluids.Eng.pdf and in Spanish, see https://s3-us-west-2.amazonaws.com/nwrn.org/files/NW18/Liquidos.esp.pdf. These should override the water-consumption suggestions in all of the documents below.
The Oregon Health Authority has an excellent web page on Extreme Heat, that includes FAQ sheets in English, Español (Spanish), Русский (Russian), 简体中文 (Simplified Chinese), Af Soomaali (Somali), and tiếng Việt (Vietnamese). Find it at https://www.oregon.gov/oha/ph/Preparedness/Prepare/Pages/PrepareForExtremeHeat.aspx.
Homeland Security’s “Ready.gov” website has a thorough discussion of how to stay cool and safe in extreme heat, at https://www.ready.gov/heat. The National Institute for Occupational Safety and Health (NIOSH) has a page on how to identify signs of heat exhaustion or heat stroke, and what to do about it, at http://www.cdc.gov/niosh/topics/heatstress/heatrelillness.html. CDC has a program that sends out a weekly email on Five Minutes or Less for Health Weekly Tip, which also covers skin cancer, hydration, and communicable diseases from mosquitoes and ticks. Review their hot weather Tips or sign up at https://www.cdc.gov/family/minutes/tips/summersavvy/index.htm.