I wouldnt worry about it, i have seen gas boil in the tanks on chainsaws in the summer, yes it will actually boil with out exploding or catching fire its a liquid. Not totally sure what the boiling point of gas is but i know the little MC limbing saw that i have if i give it a good workout on a hot summer day you can take the cap off the gas tank and get it boiling rapidly. Now thats hot!
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1984 Honda ATC200ES "Big Red"
1982 ATC200E "Hondie"
1988 TRX300FW "Project Quad" Still in progress....