Sussex voters can elect councillors in charge of their most vital services in elections on 7 May.
Emergency services were called on Friday morning to reports of a fire at King Alfred Leisure Centre.
Two people have been passed into the care of the ambulance service after the fire on Sunday morning.
East Sussex Fire and Rescue Service says there were no injuries as a result of the fire in Hove.
The hotel has been evacuated and no injuries have been reported, the fire service says.
Residents say vehicles were "crushed" by the incident in Hove.
South East Coast Ambulance Service says seven people were hospitalised after the leak in Hastings.
East Sussex Fire and Rescue Service was called to the fire on Rosebery Avenue, Eastbourne.
